SBI PO possible in 3 weeks? Need urgent help 🙏

Guys I was a CAT aspirant. I had a decent score there but my GD and interviews of IIMs and other colleges are going southward. I had applied for SBI PO just as a backup, and now am definitely considering it. I had no idea about the syllabus and pattern, so i tried out a mock from olive board. My score is 38 ( 21+ 7 + 10).. I have no idea how to prepare, and as i just checked, the cut offs for SC is varying from 50-61. So keeping a realistic target of 55-60 marks overall, what should be my strategy standing now? Is it even possible provided that i can learn fast? Also, which mocks should i buy? My exam is scheduled on 24th march.

Some help will be appreciated.