Engineering

There are multiple institutes which offer coaching for JEE Main + advanced like Allen, fit JEE, aakash. The cost will be high if you opt for offline coaching but they will provide you with so much content daily that you won't be able to cope up with them and if you follow them consistently and do all the questions, revise theory then surely you will get a good rank in JEE exam. If you want to opt for online which are generally self paced then you can look into ed tech platforms, I don't know how good they are but you can look for reviews or just see online from where you can get a good idea of how good there courses are and decide for yourselves. I will just say that if you can get a good rank in JEE Mains and have a thorough knowledge of NCERT and all the topics then just do previous year questions of JEE Advanced because the questions asked in JEE Advanced are just formed by mixing of topics of different chapters if you know how to interconnect two or three different topics and how to apply them you can get a decent rank in JEE Advanced.