how to self study sfm without classes

practice manual is not enough, if you have not done classes then good book for you is Padhuka (G. Sekar Sir's book)

if you start from today (2nd July, 2016) you have sufficient time to complete padhuka book.

There are no short cur to get success. Take DR. JB GUPTA BOOK and try to solve each question with conceptual clarity.

For self study S.D.Bala is the best book. Must do PM 2-3 times with that. Enough for 60+ if ur concepts are clear