How to improve as a 16 year old 5”6 Female Forward/center who wants to be a varsity player

I’m not used to rebounding. I’m not scared being physical but rebounding always catches me off guard. As A pretty tall player I always Fight rebounds against someone my height but way stronger than me.

I always get mental block during games. Like actual games. I’m okay with Causal exhibitions since it’s just for fun but I always feel like my brain ain’t functioning in an actual game

I feel pressured when I get contested.

I feel actually I know I’m not used to this position, actually I never liked to be a forward imao