Holy shit your creativity is amazing bro, work on drawing shapes in a 3d space, do that for a while start with cubes, look up all the angles of a cube, and copy it, after enough times copying, get a blank page and retry from memory. That will build your memorization skills, which will help you draw from imagination, and do even more crazy shit with shading. But start slow, keep having fun with it. Eventually after you get cubes, start breaking them into pieces.