Not screwed at all - but you’ll have to work hard if this is truly what you want. @toowonderful gave some great advice. Being in a musical is a lot different than watching one and singing along. There is A LOT of standing around time during rehearsals and as an athlete always on the go, you may find that to be more than you can take. Definitely get into ballet class ASAP, or jazz/MT dance if that’s not feasible. Vocal lessons with someone who is familiar with MT singing as it is today - as opposed to a choral teacher who may not be in touch with the current MT world - would be helpful. Good classical training could also be helpful if you are just starting out. Drama class is good. If you can swing some acting coaching, that would be of benefit, as well. That’s a lot to squeeze in if you are also playing varsity soccer this fall. You CAN do competitive sports while prepping for MT, but if your school’s (community’s??) fall musical/play overlaps with the fall season it will be VERY difficult to manage the two. If your musical is in spring, it might be doable.
Based on your posted name, I’m guessing you’re male?? If so, all is not lost. Your soccer skills may have prepared you for dance better than you realize. And it’s possible that at your age, your voice is just starting to mature into something with a nice quality and range. Many teachers will not even meet with a boy until his voice changes, so you are not far off the mark vocally.
My S is a junior BFA MT student at a very competitive audition-entry program. His freshman year roommate had been a wrestler and football player most his life until an injury in HS put an end to that. He auditioned for the school musical around the same time you are considering and was immediately hooked. He entered college with almost no dance training and only vocal experience was in choir and the school musical. By fall of sophomore year in college he was in the dance ensemble of the main stage musical. You can do this.