Then learn as much mathematics as you can, programming is not an art, its a science. The reason people tell kids "Oh, you can't make that," is because of a lack of academic prowess with what is needed to make one. Let's say that you decide to use Unity to make your game (the smartest choice for you IMHO), you still need to at least understand rasterization to build assets with the correct winding order, or find out how the random number generator works (Mersenne prime numbers?), use branching and efficient search/testing for AI, and a plethora of other things. My point isn't that you can't, and definitely isn't that you shouldn't try, it is that you should pay your best attention to mathematics.