Being sleepy means that you are either not interested in the problem you are facing, or you can't, and you can't get anything after thinking for a long time.
Solution: 1 Find a Chinese teacher and ask for help.
2. Starting from reading and reciting ancient poems, gradually transition to ancient sayings, ancient songs and ancient prose.
3. Read some biographies of celebrities to motivate yourself.
4. Communicate with your parents, find ways together, find ways to urge you to study.
If the above efforts fail, you can buy food to support yourself. This job doesn't require a high level of Chinese attainments. But this job needs strength and persistence.