How can i start my dream of my very own shoe line?

ever since the end of middle school when my old cousin introduced me to tagging and just art ive been drawing on everything. i love it so much that i tag mine and my friends shoes a lot with paint markers and they love it. nothing too big just bubbles and what not. also i always had a love for cutom shoes or just dunks that cost like 234239572935872 dollars (haha) but i wont buy them. i have a lot of ideas about styling shoes but i have no idea where to start.