Im 13 and wanna start working out...?

my first goal is to get a six pack and ripped obliques. I have prob 10-13% boy fat.when i stand up straight and im not flexing, it fells like i have no abs. The only time i can feel abs is when i flex and kinda bend down a little or when im laying down. im already eating healthy. wat do i do... i need them by about march... possible.. i think so