Hi Banana123.
You are obviously a very conscientious person, and at such a young age, that is very impressive.
My only suggestion is that your plan seems feasible to me. You are putting a lot of time into your studies, which is important, and you only have so many hours a day.
To me, you seem to have the makings of a true tzadekas, and that benefits all of us. I want to thank you for that.
Ultimately, I would say to ask a morah or a rebbe and they can ask you more pertinent questions about your day and schedule and give better advice on how to use your time.
Hatzlacha!