Welcome to the site, Boost.
If you haven't had a chance to look around too much yet, I'd recommend starting here. If you find yourself with any questions, feel free to message me and I'll be glad to be of assistance.
P.S. There are quite a few set artists who do impressive work, if you're looking for a new avi/sig. If you look through the shops here, I'm sure you'll be able to find someone who does work to suit your tastes.