How to get high school football coach to notice you at spring football?

next year im going to go out for the football team and ill be a junior itll be my first year playin there...ive played football my entire life with friends and other programs like popwarner....im 5'10 bt small...my 40 speed is only like 4.6....4.7...bt i will proly have the best hands out there i catch like larry fitzgerald