Could I get a decent six-pack in two – three months with this workout?

I’m fourteen, and am wondering about abdominal exercises. I’m not sure which are the best, but don’t have any gym equipment. I don’t understand the system of “sets of reps”, so with this workout could I have a decent six-pack in two-three months?
1st Month:
Monday (Morning), 10 abdominal crunches (held for twenty seconds)
(Evening), 10 long arm crunches
Wednesday: Same as Monday
Friday: Same as Monday
Repeat for four weeks

2nd Month
Monday: (Morning) 15 abdominal crunches (held for twenty seconds) + TVA training
(Clenching throughout the day)
(Evening) 15 long arm crunches, TVA exercises

Wednesday and Friday: Same a Monday

3rd Month: (Optional) Same as 2nd month but with 20 abdominal crunches and 20 long arm crunches.

Thank you. I’m not trying to lose weight, as I have only 6% fat.