I need some help with my prep...

I'm currently in 12th and my boards are approaching, they end on 12th March and I wanna devote my entire time for BITSAT prep. I have JEE mains session 1 and I'm expecting 95+ percentile but idk dude... I'll give April attempt too but ik my prep isn't good enough for me getting 99+% or good branches in top IIITs/NITs (17 F, General🤧)

I wanna get into BITS Pilani (Pilani/Goa) this year itself and get CSE/ECE/MnC, I don't wanna take a drop...

I have completed my 12th grade portion from NCERT and JEE Mains level and I'm scoring 85-90 in LR and Eng.

I only remember 30% of 11th grade PCM and I haven't touched the deleted topics yet.

How do I prepare for BITSAT well? I will start after 12th March. I wanna score 300+ and I'm ready to give it all I got

Kindly suggest what's the best possible strategy I can adopt

Thank you <3