Well, it can also be done with one picture, but for beginners 2 pictures is definitely easier I think it is a better way also.
And for the colors, here is one I made some time ago, it is in Latvian, but maybe the pictures will help you understand something:
http://lfslatvia.lv/forum/viewthread.php?thread_id=349
This is a simple one, but maybe you can use some steps (not all) from this tutorial with some other tutorial to make something nice.
And what I have basically been doing is that I have seen and been using a lot of different color tutorials and after a while you just start to experiment combining them all together, it takes time, but you will be able to do it if you keep trying. One tutorial is not enough, you will need a few of them just to get the experimenting started.
Anyway, you can actually find quite many tutorials at the lfsdrift.net site I gave you, there are also threads with links to different tutorials on other site etc.