Yes according to me 8 months is enough for you to prepare for a NEET exam.. But for that you have to work hard then only you are able to crack the NEET Exam . It is not an easy task but nothing can be impossible if you have aim to achieve your goals.. Read the NCERT Book thoroughly , Practice Physics and Chemistry numericals, Keep in mind exceptions in Chemistry and Biology as they're always targeted in NEET, Practice a large number of MCQs and even you can try our site if you want to do the online preparation for your NEET Exam... Here is the link for the NEET exam practise paper.
https://www.prep.youth4work.com/Medical/NEET-Test