CHANCES OF CRACKING BITSAT, STARTING NOW?

I know that this might sound dumb, but I did not give the first attempt of JEE mains... I was too scared of what the results would be. I am in 12th currently and I want to focus on my boards right now. maybe I'll sit for JEE in April or maybe not... I did not prepare much for competitive and I know I have wasted a lot of time... # but, *I want to give myself one last chance, and actually work for my goals please help me out, a good roadmap will help...