u/IMCHUCKBASS23

Hello everyone,
I have just finished my 12th grade and I’m taking a gap year to prepare for BITSAT. I haven’t done the competitive exam preparation in my 11th and 12th grade. I have to start my preparation from zero I’m not sure what I should do?what are the resources I could use for my prep (books,lectures and mock test as well).
I would really appreciate it if you guys could guide me.
thank you so much :)