Hello Nikhil,

JEE Main examination is conducted by NTA for the admissions to UG engineering programs offered by 31 NITs, IIEST Shibpur, 26 IIITs and 29 -Government Funded Technical Institutes (Other-GFTIs).

Of Course yes you can prepare for JEE MAIN with online course consider the course offered by careers360 in the link given below

https://learn.careers360.com/

GOOD LUCK!!

Hope it Helps,