I will be startin my 11th ISC this yr n was thinkin of takin up a correspondence course in Brilliant Titorial?

Will this be enough to take up the IIT-JEE entrance exam? i would have takin up normal clroom programmes under Brilliant but the ISC syllabus is very vast n hectic so i though i wud not be able to manage both. Tht is y i decided to take up a Correspondence course. SO will this b enough?