Lost? Need Advice

Autumn
When I was younger I use to be the most outgoing person In the world. I would do everything and anything. I wasn't afraid of anything or anyone. But than I got picked on and everything changed. I became more of like a wallflower I barely talk or anything. And that not how I wanna be. 
​Please help. Does anyone have any advice to help me become the outgoing amazing me that I used to be?