I don't know what I am doing

I don’t know what I am doing The taunts of my past is hovering me all the time . I have not done well in my previous attempts. That thinking of failureness is sinking my days But Can I still get a good rank in this 55 days if anyone have done it. I honestly can study 12 hours a day but from the last 10 days I could hardly study 4 hrs. If I could study 12 hours a day Can I still make it under 10000. If anyone have improved in this last 2 months . If anyone can suggest some ways it would be of immense help.(Actually I have no one to express that’s why I am writing this post here).

Dont loose hope… n dont be lazy either! Everybody feels the same at some point, get up and do whatever your best is