Follow these steps this will help you to get a decent rank in jee mains 1.see the syllabus of jee mains 2. prepare the topics from the syllabus through ncert previous year question papers and also take modules from vmc and narayana for preparations 3. you can give online test on embibe website and analysise your score 4. you have to try to understand short tricks to solve the question fast 5. prepare a separate notebook for imp formulas and do regular revision of it i think if you follow these steps this would be sufficient for you to get a good rank in jee rest for study materials for physics -hc verma and i.e iridov for chem-solomon for maths-rd sharma and modules of coaching centers youtube channels for phy -pradeep khetrapal is the best
Well if you are really interested you must go to KOTA. Its a hub for that. There are numerous coaching institutes and moreover you can get the suitable environment for studying for JEE exams. Or else you can do preparation on yourself too by solving the mock tests and clearing your concepts with NCERT books and other souces.