Definitely you can , there is nothing in this world which is impossible
If you start from now you can get even more than that, sometimes luck and smart work really helps you if your determined enough.
I can motivate you and give you a plan if you want to do something instead of worrying a nd seeking answers from others
So we will start with
- Chemistry— everyday 3 hours , read inorganic chemistry for a week in the Morning and keep revising it every Sunday after that week . Give one month for physical chemistry and small topics and one month for organic chemistry, Do Every topic in detail and keep revising it the next day in the morning. Keep revising the formulas here and write you own shortform and concept notes . Plan according to the weightage .
- Physics—everyday 3 hours ,start with 11th and do easy small chapters like semiconductors so that you can get a grip and understanding plus you build confidence. Pay more attention to topics you understand better and start solving questions. Alakh panday sir on YouTube is good.
- Biology — everyday 4–5 hours of biology and questions solving read the ncert like a Bible in one month you’ll be done with 11th and 12th in another month. Try to complete learning in 2 months and keep revising it