The beauty of weekend projects is that if you do enough of them that are fun for you (and not freighted with intense strategy) one day, you will have those skills.

I started off with a kinda boring job, mediocre graphics skills and the tiniest grasp of C syntax. Now I get paid to design and build iPhone apps. It's awesome. But it all started with little side projects to sharpen me up. Start practicing, you can do it if you commit.