What do you mean by "I can't actually do anything with it"?

If the problem is that you know what Ruby code looks like but don't feel comfortable enough to build stuff in it: go build stuff in it. Seriously. Just go write some code right now, Google around when you get stuck, and half an hour later you will already be a better programmer.

Do a few http://projecteuler.net/ problems. Just, like, three or four. Bam: You've programmed.

Programming can seem like this big, scary thing; it's easy to feel like you're on the other side of this big huge wall and to say "I don't know how to program, so I can't program." The catch is, the only way to learn how to program is to program, and no in-browser language tutorial in the world can change that. Go for it, and ping me if you get stuck.