When I sign up under an instance, what information am I sharing to the host?

I want to sign up under this instance and host communites, but privacy is important to me.

Privacy drove me off reddit, I looked around for these answers but not sure where to come across them.

1)Am I sharing my IP address/ location with my host instance? 2)is there a log of my view history 3)i know that this instance has a heavy Piracy base, what is the risk of joining this? 4) are there general privacy concerns that I am not thinking of?

I know these may be dumb questions but as a user and not necessarily the most tech savvy, any education would help!

I do not want to be in a position where a Government creates an instance, and allows them to monitor.