I just started playing chess960, I'm reaaaaally new to it. I'm not sure I like it much yet. Anyway, this was an interesting game, there were some awesome forks and pins and finally a very unexpected (for me at least) forced mate that was almost inevitable.

How do you go to Chess960?

You have to pick that in advanced options of starting a new chess960 game. Or you can join a tournament or team match that is 960.