Is it too late

I am a junior in ap bio and i just started studying for the usabo. Rn im learning the steps of glycolysis and it takes me forever to try and memorize the campbell biology pages. Usually takes like 5-10 minutes a page. I also have a long commute to school and my school day including commute is 6 15-5 40 and i can only dedicate 1-2 hours to bio. Is it possible to make it to semis?