Basically, I just moved to a new school and at my old one, I was well known and outgoing. People liked me for who I was and were friendly with me. With their support, I managed to do great things there and make everyone smile. But at this school, I got started on the wrong page, and everyone thinks I'm shy, nerdy loser. I want to somehow show them that I'm much more than that weird girl who raises her hand a lot and tries to make friends, cause I'm really not. I'm energetic and bubbly, but everyone thinks otherwise. How can I show them who I really am?

So it seems like you have a dilemma here, but one that can be easy to solve. You've got to stop caving into this shy and nerdy stereotype and instead try and act more like your real self, talk to people and make jokes etc. A lot of people underestimate how much your voice can do and the way you speak, but if you speak confidently others will realise your extrovert tendencies. Being yourself is always the way forward, and walk into school with your head held high, when you talk to people try to be as confident as you can and slowly you'll notice that people see you in a different light.