Ello there, I'm Mewsie.
You get an avatar and signature once you reach a certain amount of posts (I THINK its ten, but its been a LONG time since I was a new member). You can do this by posting in certain areas of the forum (anywhere that's not Dufferland- and possibly the Lamppost- section basically).
Also, no one but you knows that you have posted on your own profile page, so if you want to ask questions directly to someone, click their username like Copperfox said. There are also general forums for newbies to get questions answered.
(Also, I love reading, writing and archery. I've written four books, actually, they're all on this forum in the "Professor's Writing club section, and in links in my sig if you're interested.)