I think what you need to realize is that it is not a question of proving that all of those things are false, but rather that it makes no difference whether they are or not. For example when you go to sleep and wake up it feels just the same whether it is still you or a different person, so it doesn’t matter at all.
Also, you’re changing all the time anyway, even when you’re awake. You have experiences, you learn things, you accumulate memories; all things that change you.
I think what you need to realize is that it is not a question of proving that all of those things are false, but rather that it makes no difference whether they are or not. For example when you go to sleep and wake up it feels just the same whether it is still you or a different person, so it doesn’t matter at all.
Also, you’re changing all the time anyway, even when you’re awake. You have experiences, you learn things, you accumulate memories; all things that change you.