Who or what is there to be under going ceaseless births and deaths?

Upon the realization towards selflessness and impermanence, where there's no existence of an independent and permanent 'I' in all kinds of impermanent names and forms, of sentient and non-sentient beings and objects, then, who or what is under going ceaseless births and deaths, or so called seemingly endless 'reincarnation'?

Who or what, that is 'coming back' again and again into different 'life forms' to be suffering or enjoying, and to be attaining liberation from all that?

There are some genuine buddhism practitioners or yoga practitioners who have intense yearning towards liberation, however, many of them are being so tensed and worried in the present moment now, being doubtful towards themselves, thinking that they are most probably being unable to achieve the seemingly impossible task to exit the 'ceaseless' wheel of births and deaths, or the 'endless' reincarnation, or the 'ceaseless' transitions or rebirths into different names and forms in different realms upon the end of every birth that leads to death, that leading to be having another birth and death, endlessly and accordingly to the respective 'karma' that was being accumulated from countless 'past life existence' in different 'realms', and is continuously and 'ceaselessly' being generated and keeps on accumulating, either wittingly and unwittingly, or consciously and unconsciously, in this 'present life existence'. As for them, 'liberation' is all about exiting the ceaseless wheel of births and deaths in different names and forms in different realms, upon the complete clearance of never ending karma, that seems to be impossible to have an end to it.

If the minds can just shift their attention away from the attainment of the 'liberation' that is about exiting the seemingly endless wheel of births and deaths by the end of this precious human life existence in this 'realm' of human beings, that seems like an 'impossible' task even after stop performing all kinds of so called 'evil' actions and performing all kinds of so called 'good' actions to be accumulating many virtues and merits, but then, to start focusing on attaining the direct self-realization towards the truth of selflessness and impermanence, or the annihilation of the idea of 'I' and egoism, or the annihilation of the veil of ignorance and restlessness, via self-inquiry inquiring towards what is 'I', what is the restless modification of the mind, what is the root cause of suffering, and what is the end of suffering, they will have peace in this present moment, instantly.

Inquire towards why did all the past buddhas in Buddhism and gurus in Yoga emphasize on the self-inquiry and self-realization towards what is 'I', about birthlessness and deathlessness, a.k.a. the void of births and deaths, upon the annihilation of the idea of 'I', upon the annihilation of ignorance, egoism, impurities and restless modification of the mind, or upon the attainment of self-realization towards the truth of selflessness and impermanence in all kinds of names and forms, regardless of 'how much karma have been generated and accumulating from don't know when it all began and when it all will come to an end'.

Meanwhile, all those past buddhas and gurus were continuously performing many kinds of actions in the world until the end of life existence after the attainment of self-realization towards the truth of selflessness and impermanence in all kinds of names and forms, including the limited conditional selfless life existence of the selfless impermanent physical body and the perceptive cognitive intellectual emotional thinking faculty, however, there are no binding 'good or bad karma' being generated that meant to be initiating and fueling the restless endless 'wheel of births and deaths', or what most minds referred as ceaseless 'reincarnation' in different realms, where the main keywords for attaining liberation in both Buddhism and Yoga is non-grasping or non-attachment, selflessness and impermanence, and knowing Thyself, or knowing what is the 'I' that the 'thinking' identifies and believes as 'I'.

What does it mean, about the presence of suffering, the root cause of suffering, the path of liberation from suffering, and the end of suffering, a.k.a. the absence of suffering?

What does it mean, about restless 'births and deaths' of 'I'?

What does it mean, about ceaseless endless 'reincarnation' of 'I' in different 'realms' that are also limited and conditional, selfless and impermanent?

What does it mean, about even if 'I' am in the 'realm' of 'heaven' or 'hell', this is also impermanent, that this will also pass away?

What does it mean, about all kinds of 'realms' are existing and interchanging in this present moment?

What does it mean, about the restless selfless impermanent changes of ceaseless thoughts 'arising and passing away', that generate the ceaseless endless different 'states' of mind, governed by the nature's law of cause and effect in the present moment now?

What does it mean, about upon the annihilation of the restless 'modification of the mind', upon the annihilation of the idea of 'I', upon 'desirelessness', in silence and in stillness, in timelessness and in selflessness, that the wheel of 'births and deaths' doesn't exist, and that 'suffering' doesn't exist?

What does it mean, about 'living' in the present moment, that the only existence is in NOW, and keeps changing selflessly and impermanently?

What does it mean, about the highly importance of 'Thus have I heard' in the beginning of every so called first-hand 'dhamma' in the form of writing or speech as requested/instructed by Siddhartha Gautama Buddha just before he passed away, not to say, in the so many 'second-hand' dhamma, 'third-hand' dhamma, 'fourth-hand' dhamma, and so on?

That's why Siddhartha Gautama Buddha never wanted all his direct teachings or the dissemination of dhamma to be written down in text form, or to be recorded down in any form, and strongly insisted about non-blind believing, non-blind following, non-blind practicing, non-blind propagating, non-worshiping (not to say, non-blind worshiping), and to be inquiring towards the truth of everything via self-inquiry and direct realization under certain observations to be purifying, disciplining and quieting the mind, that enabling self-inquiry and self-realization be happening, as all the uncontaminated teachings or dhamma as what it is, that will free the mind from the suffering deriving from ignorance, is available everywhere inside and outside, and at all time, limitlessly and unconditionally, for all minds to 'know' it, even the most 'evil' minds in the world can 'know' it and be 'liberated'.

Inquire, and be free.