Advice on my cheer team situation

It's my first time being on a high school cheer team/any cheer team in general. We have a new coach who also coaches an all star team so she pushes us pretty hard. My issue is that I am setting everyone back because I'm too weak and small to be a base. They put me as a flyer as well but we only did it a few times and I couldn't get the hang of it either. We have exactly 12 people on our squad so it's enough for 3 stunt groups so not stunting isn't an option. I just don't like that I'm slowing everyone down and I know I am. Any advice on what I can do to catch up to everyone? I feel like dead weight on the team.