I wouldn’t talk to anyone. It would disrupt the time-space continuum or whatever. I heard you’re not supposed to communicate with anyone.
I would just walk around and look how people dressed and behaved, how cities looked, how was it to live in some periods of the past.
Is the time in the past limited? Like, do you get back to your time after a while? Maybe I’d make some schedule if it worked like that.
Are there other limitations? Can you go back only to a certain point, or can you go to any time in the past? If not, I may as well go back to the prehistoric age and see how humans back then lived and looked like.
I’d like to see some monumental, famous happenings, just to see and feel the moment, or some interesting moments in history. I’d like to see how some people really looked like, how did they speak and behave.
I’d like to see Gavrilo Princip. Not because I fancy him in any way, but simply because what he did triggered a chain of events that changed human history forever. WWI was an event that had an enormous impact on whole European civilization, and it all started with one teenage boy killing a duke. I wonder if he was aware of what did his doing trigger. Perhaps he never even dreamed that what he did would spark such a huge, horrifying period. I’d visit him in his prison, just to see his face. Was he a real, hardcore terrorist blinded by nationalism, or some deluded boy who believed he was doing something good? What would be his reaction, if I actually told him everything that happened after his death? Would he feel guilty?
I’d also like to visit Tesla, and Michelangelo, and Bosch, and may others.
I’d also like to witness some happenings. How did people react when they used internet for the first time? How did it look to see the first airplanes ever flying in the sky, or first steam powered ships? How did the first flight into space turn out? How did the world celebrate the year 2000? How did the Great Schizm take place?
Who spoke the first language, and when, and where? How did all those ancient languages, like Proto-Indoeuropean, Summerian, Proto-Slavic and others, how did those languages sound like?
I’d just watch and listen.
I’d avoid any war attacks and battles, I don’t need to see that.