Not a troll, just a briainlet. Does science/math support the following breakdown of existence?

>Nothing
>??
>Big Bang
>Earth
>Abiogenisis
>Evolution
>Humans
>AI
>??

I mean, the universe and all of existence came from nothing and we were a side effect of that and we are here for a few years until we die and stop existing for eternity?

Is this the jist of it? There is no deeper meaning or explanation of existence? It's all just a random occurrence and death will be the end of us?

If I'm wrong, please correct me. No trolling. I'm trying to understand. And how can I better understand the origins of the universe and life? Can someone explain it to me in the simplest way possible?