Welcome to YT
If you click on 'forums' at the top of the screen (under the yorkie's head!) you'll find a forum called 'Yorkietalk how-to guides'. There is a sticky that Nancy19999 created about making a moving avatar. The instructions are really clear and helpful so give it a go!
I managed to make one really quickly using nancy's instructions and I'm useless with computers! If you have any problems PM me and I'd be happy to try and help
xxx xxx