hi rahul, to be honest ther are many good institutes our there, like Aakash institute . Allen kota,career point etc, it all depends on various factors, basically if you have the right guide and if you put your efforts in the right way, you could make it irrespective of wherever you join, and it also depends on your accessibility to that institute , if you could go to kota or any place. i am an ex aakashian so i know about aakash and i can talk about it, i felt its really good, the  teachers are very good and helpful, and i really loved the materials they provided.but mind it unlike many institutes in AP and kerala, they wouldnt force you to read like making it mandatory, but they will show you the correct path and you need to show some enthusiasm as well,good luck

I would say coaching preparation material would be helpful but your primary source should be NCERTs only for NEET, AIIMS and JIPMER as the syllabus is more or less would be the same for all. Apart from this, below I am providing few preparation tips which would be helpful for you - Know the syllabus - The first thing which you need to know is the complete syllabus and accordingly prepare. Important topics- Physics – Optics, Mechanics, Nuclear Physics, Thermodynamics, Chemistry – General Organic Chemistry, Mole Concept, Periodic Table, Coordination Chemistry, Chemical Bonding. Biology – Genetics, Ecology Environment, Cell Biology, Morphology, Basics of Biotechnology, Reproduction, Physiology of Animals Plants. Good Study Material - The most important element to prepare for any exam is good study materials as better to choose the standard preparation material. Create a time table as per your schedule - Get a calendar and a diary, set your priorities, set out long study hours. Take care of your health. Don’t sleep during study time. Practice NEET sample papers and previous year’s question paper - All NEET aspirants should do practice on sample and previous years papers as these would be helping them to know the important questions. Prepare notes - The best way to improve memory skills is to prepare notes while studying. Candidates should write down all the important notes in a copy or diary which can be useful for revision before the examination and save a lot of time for them. Online mocks - It would be better if you complete your syllabus till December and keep Jan-Feb for your sample papers and previous year papers and once you are done with these, start doing online mocks because these will be showing you all your weak areas along with actual paper pattern and accordingly you can practice again and this will also teach you time management skill during exam . Books which you can refer - Biology: NCERT Biology of Class XI and XII, Trueman's Biology Vol 1 and 2,Objective Biology by Dinesh, Pradeep Publication's Biology, GRB Bathla's Publication's for Biology. Physics: Concepts of Physics by H. C. Verma NCERT- Physics Part 1 and Part 2 D C Pandey Objective Physics Fundamentals of Physics by Halliday, Resnick and Walker Problems in General Physics by I. E. Irodov. Chemistry: NCERT Chemistry Physical Chemistry by O.P. Tandon Organic Chemistry by Morrison and Boyd for Organic Chemistry Modern’s ABC of Chemistry for class 11th and 12th Concise Inorganic Chemistry by J. D. Lee for Inorganic Chemistry Dinesh Chemistry.

You can get sample papers for your practice through below link -

NEET Sample Papers

Good Luck!!!