11th fail help

I failed class 11 what should I do ? Do 12th this year from NIOS then take a drop? or repeat 11th because I know very less of 11th only on board level and maths not even on that.The only issue that I have money constraint I don't wanna go to a regular school and dummy school fee is too high and my parents can't afford to again give full fees of class 11th again