The NEET exam syllabus is the same as your boards syllabus, so yes, you can.
Only thing to keep in mind is that for NEET, you will need to practice a lot of questions so that your concepts are solid and you are able to apply them to solving the questions.
Here is what you can do.
- Make a time table where you mention which topic you will be studying on which day.
- Keep some time aside for your regular school work and assignments.
- Make sure to revise all the concepts that you learn in school on the very same day.
- Once you finish studying a concept, prepare your own notes where you mention all the important points, formulas, highlighted topics etc.
- After learning the topic, solve 20–30 questions related to it, first from your NCERT text book, and then from other study guides where you can solve higher difficulty level questions.
- For both boards and NEET, you need to regularly solve previous year question papers and full length mock tests. Analyze your results afterwards and identify which topics you need to spend more time revising.