You need to get gifted or buy stuff from shops. It honestly can take a long long time. Miy first gift took a year. Enter gift giveaways and maybe you'll get pretty stuff :)
You need to make lots of T$ by betting on people in rookies games that are charities! If someone has lots of bets placed on them it’s because the cast is trying to help them win. You need T$ to buy designs for ur avi (which are always overpriced). You also get T$ by winning games. Also someone could gift you a design!
Designs get posted in the shop