I would focus on your recipes and start with the basics, smoothly frosting a cake (very important), basic piping (letters, sayings, etc.), torting, etc.
All the decorating skills in the world won't get you anywhere without a good (tasting) product!
It's hard for me to judge you at this point, your skill level that is. Not everyone can do this, but you seem to have the drive. Some pick up faster then others, what's important to focus on is "Are you getting better with each cake?" I think that's a better question to ask yourself or us. So read about techniques, check out tutorials, there are some very inexpensive online cake schools, forums, etc. practice baking, filling, crumb and final icing a cake-once you've accomplished that move onto the next step (maybe covering with fondant-it really depends on the kind of decorating that appeals to you).
Ask questions, and keep us posted, take pictures of each cake and in a month or so look back at this cake and ask yourself (or us) again. If its something you enjoy, keep doing it. You don't have to go into business. I still practice new techniques (and older ones) on cake dummies. Best of luck!