I’m just a student heading to BS in the fall, but I would have to agree with @stalecookies. I am similar, started Kindergarten at 4, will be 14 starting 10th grade(although I will turn 15 a month in). I was, and you can ask @stalecookies who was one of the first replies on my first CC thread, not very mature. In fact, I think it might’ve been her that first told me to consider repeating-and I did consider.
I almost applied to 4 schools as a repeat. I decided against it because I went through a lot months August-November, and I had matured a lot. I felt a lot more comfortable applying as a 10th grader.
Your situation is different. 10th and 9th grade have similar admits compared to 11th grade. Unless you do A LOT- an unthinkable amount of maturing, I would repeat. Even if you did mature this much, I’d still recommend you repeat. You’re really young and 10th grade most likely will yield better results than 11th. Repeating is common and you won’t be the only one. @CavsFan2003 probably has a better perspective on this since they were in a more similar position than I was in, but I hope I have made some helpful points.
At my BS, pretty much all the new 11th graders are athletic recruits.
All we want is the best for you. I think repeating will be best for you.