it all depends... there infinite worlds... some very similar some very different... one thing for sure though you will never be the same... you will mentally deteriorate and fastWhen you time travel you just go a parallel universe copy of that time period.
However everything would be different for the most part, a parallel universe would mean that everything would be different and the opposite.
It would be like if bob had originally had long hair.
but in a parallel universe it’s the opposite his hair is short.
Your favorite actor in the 80s or 90s. Wouldn’t be an actor at all.
They would be something else.
See what I’m saying everything would be the opposite.