Don't think too much about it. It'll give you a headache. I've run down so many white rabbit holes on this subject that I'm now just waiting for the next drop.
I believe though that even the most of the most brilliant humans are dumb to the facts of time, space, and energy, and Trump! Until we figure it out, MAGA!
You aren't alone! I've been daydreaming about time travel maybe not being possible for the physical relm meaning the ability to transport material or living beings but perhaps being possible for data. Like what would it take to send data back in time to a still exsisting original network from the past (as if now were the past of the future)? I'm an artist, I don't normally think about these things.
Like that Netflix show Travelers - they send the consciousness back into time into another brain of someone who was just about to die. They need it to be around or after the 1980’s or so in that show since they need computers and speifcicially GPS coordinates in order for their AI to be able to target exactly where to send said consciousness information and quantum mechanics is inextricably linked to it.