If I failed my 12th cbse board exam 2026 (main 3 subjects) and reappearing in 2027??

Don't mind the timing

If someone went though this I just need some guide about how I'll appear in exam centre being a private candidate and all important minor things.

My academics condition sucks and I need some enough time I completely wasted my precious 2 year I'm quite aware now but quite exhausted and I really wanna try but just not right now. I lowkey wish life didn't have much options haha