I had an existential crisis when I was probably 11. It haunted me and I didn't sleep for days because I was contemplating, constantly.
My belief now, after many psychedelic trips is very akin to the short novel "The Egg" by Andy Weir. Even if I have no idea what the truth could be, I take comfort in that fun read. It seems right to me
I've always been a fan of, we're the universe experiencing itself.