Does your school have a college counselor? (Check the school website if you don’t know). If yes, when school starts, make an appointment with him/her (whether online or not). As for the lack of graded papers ( or rather, lack of papers with comments), work on this when school starts in your English class. See what comes back on your first assignment, and if it is more of the same (100%, no comments), talk to your teacher, explain the need for a commented paper for your application, and ask if he/she could kindly grade your next paper that way, or regrade an older one.
You can’t change your school situation, but you can do your best to work within it. You may have to do a lot on your own, but sounds like you are ready to do that, and to start early which is good. Good luck!