Morning, Lindsay, and
!
Tickers, signatures, etc. are pretty easy. Look on this page, a little up and to the left of here. There is a bluish/purplish bar with the words "User CP" on it. See that? Click on it.
That'll take you to a page where you can customize your display info. In the column on the left, you can customize Your Signature (the stuff that falls below the line of your post, like tickers and stuff), customize Your Profile (that's where you can add the info that displays under your avatar picture), customize Your Avatar picture and more!
Have fun, play around with it! I can't wait to see what you come up with!