Ooooh... lucky you, you're in Colorado. The Denver chapter is one I'm looking forward to travelling to at some point either this or next year.
The owner of your local chapter is super knowledgeable and from what I've seen of the players on the boards here, they're all super friendly and helpful. If you scroll down to their section on the forums, you'll probably be able to get some good, local help.
Lots of players form teams in game for their characters to adventure with. Some players have multiple characters belonging to different teams so that they can have a different experience at game from time to time.
Some characters don't join up with teams... it can be harder to play the game this way, but it can also lead to some really fun times. Whether you join up with a team or not is totally up to you as a player. If you do decide to go it alone though, don't be that guy in the corner who wants to brood, but wants everyone to notice he's brooding. As someone whose main character isn't on any team, my personal experience is that trying to be friendly and helpful to almost everybody, listening to the people you're supposed to listen to (nobles and such) and generally just having a good attitude are a great way to explore your options while keeping your choices open.
When you sign up for an event, you can sign up to play a character of yours (PC) or be part of the cast and crew for the weekend (NPC.) If you PC, you're the one in control of your character all day/weekend. If you NPC, the staff of the game will give you various roles over the weekend (typically lots of monsters that get killed a lot, but that's ok, you get to respawn
) and otherwise direct your at game time with set-up and take-down and other tasks. PCing costs money. Most chapters allow people to NPC for free, but that's not always a given based on lots of stuff, such as site or food costs. You'll have to check with the chapter you want to play at.
Let us know if you have any other questions!