Cool stuff! I think its awesome that you are starting to pursue digital art and at this point keep in mind it should be fun.
When you feel ready I highly suggest looking up videos on youtube about the fundamentals of art. (form, line, color, perspective, anatomy). I have a list of great resources if you are serious about taking the next step, so just PM me and I can send them your way.
If you learn the fundamentals it will let you draw anything you want, real or fake.