@AlyW, I believe you should research NROTC more and understand the missions and career fields available, by reading everything available to you on NROTC programs and Marine Officer careers. Visit a nearby NROTC unit if you can. If College graduates who commission as officers - through a service academy, ROTC, or other program - go into career fields where they may supervise hands-on technicians as part of their own officer specialty. They are not likely to do aviation maintenance themselves.
If you want to be a hands-on aviation maintenance technician, the Services with aviation elements are very good about teaching enlisted personnel with HS degrees how to do that.
If you plan on getting your college degree, and do NROTC, you will be an officer, charged with learning your own professional specialty but leading the efforts of enlisted personnel who work for you.
The Navy does have engineering duty officers, but explaining that and the paths to get there is a bridge too far for this post.
The Air Force has a community of aircraft maintenance officers - see
https://www.airforce.com/careers/detail/aircraft-maintenance-officer
