Making characters is quite possible if not exactly easy. I have done 100s but not for a few years. The main thing is not to get too ambitious. I've done working animations and they work fine, but they are quite sedentary ones. Sitting in a chair and looking around - sitting on the floor. No backflips or anything like that. Fact is, to get realistic action animations you need a MoCap studio and all the kit to go with it.