O ok gotcha.
Physically, it sounds like you might be ok if you can get into the 80's. The mental part of the game is a whole different stories, especially for a pitcher.
It is very difficult to come out of middle school and go right into the varsity level. You will be pitching against 18 year olds who have played high school ball for 4 years. You will be required to master many different pick off plays, and bunt coverages. Sometimes, JV is a necessary step before Varsity.
Definitely keep us posted on what happens!