Hello and welcome! Your politics sound like mine; I'm a dirty, liberal hippie with a very
teensy streak of conservatism (though I find it works rather well).
Following Khab's advice is the best way to go, as the CO has a lot of helpful topics and what you can't find there you can always ask us about. In the meantime, I suggest taking a look around the forum. See what interests you, jump into conversations, etc. It makes getting to know the place simpler to do it almost at random, I think.