To be honest, many of us will give our suggestions, but nothing will increase your score if you do not dedicate a big part of your time to exam preparation. In big time, I mean at least 8 hours of studying per day. It is a lot but honestly speaking, it’s the least amount of hours you should dedicate to it.
Online coaching is quite expensive, so I would get an e-learning platform instead. Lecturio for example has great video lectures, reading materials and practice questions for NEET. They teach you in a way that can help you understand the concepts, and only after that remember them. I really think that investing in such thing instead of online coaching is much more winning.
hope this helps and good luck!