Whats the fastest time it takes to start to form abs?

Im trying to get skinnier and just look better Im only 14 and Im going to high school next year so that should explain that lol. I'm not fat I just have a little pudge on my hips and tummy. But I just really want abs so what the quickest time it can take for them to just start forming? And im devoted to this so tell me even if you might think its difficult for someone my age. Thanks :)