Hey! Welcome to BTT, you're gonna have lots of fun. Editing your Tweenie is really easy, here's how: Go to Profile >> Look at the menu on the left >> Find and Click on Edit Tweenie >> Click the Tweenie Banner thing >> Click Purchase Item and click on the folder Tweenies >> Scroll Down to pick a character, these cost Tween Cha Ching and you should have 1,000 since you just joined >> Continue buying and clicking on folders (Clothing, Backgrounds, Cars, etc).

There, that should help you. If you don't understand something or have any other questions, talk to me or any of the other members/admins. Have a nice time at BTT.

__________________
Everything obvious has been invented; Think outside the box.