i got 96.3 percentile in jee mains what will be my rank

i belong to obc-ncl sir 

In that case, your probable rank will be 32,966 - 36,966 and your probable category rank range will be 8102 - 9102.

thanks a lot sir .sir how to prepare for jee advanced at a full fledge

Focus on following points, and add or remove whatever works for you. Improvise them:
Join a good coaching: No matter what anyone says about cracking JEE without coaching and stuff, I feel its become a necessity to be guided properly . So dont take any chances with your preparation. Join a reputed coaching in your locality and get started.Start earlyDiscipline: Keep a daily schedule. Make sure it's practical and balanced.Time yourself when you solve a question: Youll see yoursellf improve your speed and accuracyEnroll in an AITS: Take FIITJEE or Resonance. FIITJEE will be tough, but it will be tough for all, so you can get a taste of the worst case scenario.  they decrease the level in the Full Tests so it will be a confidence booster of sorts. Resonance is ideal in terms of difficulty of questions. Books: Math: Arihant Series, Vikas Gupta, Resonance Material. Physics: Irodov, Resonance Material. Chemistry: Organic: Himanshu Pandey for questions, Resonance Material, Physical: R.C. Mukherjee, N.Avasthi. Inorganic: Resonance Material. Consult your teachers and see what suits you best..Dont lose focus in the last 2 months. Thats the time when you have to run the last mile of the marathon.