Since the start of the pandemic, i think i've become depressed. i've lost interest in doing research and especially, learning and doing school works. are there medications that could help me? i don't want to fail. thank you?

Before meds talk to your parents and see your pediatrician. The last 2 years were tough, meds are not always the solution.

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!