You can always look at tutorials posted here in GFX void. Daemon has some excellent begginer and intermidiate tuts. They are easy to follow and they yield great results. Do as many tuts are you can, and take bits and pieces from each tutorial and apply it to another sig that you make on your own. The point of tuts is not to get the exact same outcome as the maker, but to learn from them and be able to take what you have learnt and create something really cool later on, all by yourself.