Ah geez, PC is a huge community so there is a looot we can say here. I'd recommend signing up for a mentor at the
adoption center to get yourself started - it's a great way to make your first friend and learn the ropes of the forum. Obviously reading and understanding the rules is a major first step but past that it depends on your interests. Have you been to forums before or is PC your first? Might be a little confusing at first but again, that's what mentors are for. c;
But anyways, welcome welcome, LegendaryRising! Nice having you here. Feel free to give me a poke if you have questions too - wish I could help out a bit more but your question's such a general thing that I can't figure out what to say unless approached about more specific things, haha. New users tend to make mistakes with double posting (posting more than once in a row) or having a signature that exceeds
signature rules so those are good things to brush up on. Have fun!