It's totally depends on you whether you want to opt for coaching institute or you want to go for self study. You should be determined and motivated to crack NEET exam. You should make sure your concepts are clear and you build strong fundamentals. You can take help of NCERT books for your preparation.

Analyze your mistakes from your last papers and try to improve them. Focus on the important topics solve as much as mcqs for your practice. You should also solve as many as mock test series to check your preparation level. So, you can work upon your weak and strong areas.

All the Best!!