Hi Jacob, it’s wonderful that you have set a high goal for yourself. The speed is above average for a 14yo. However, I have seen plenty of young pitchers who can gun the balls, but they lack controls and command. Some even do poorly with runner(s) on base or scoring position.
Honestly, I feel your off-speed can be worked on a little further to “slow it down” At low 80’s, it above the same speed as your FB, it will not work “effectively” against batters with great timings. The main purpose of off-speed pitch it to throw the batters off their timings and positively balance.
Maybe you can share a little more of your game STAT or experience. A video is worth a thousand words and we can “objectively” share our viewpoints with you.