It's really not as hard as some make it seem. You just have to dive in and give it a try. There are descriptions about each and every aspect of the materials room in the manual, too, so you have a basic understanding of what each node and root will do before you go in there. Good luck. I got side tracked when an idea struck me, but I will get back to it as soon as I get some sleep...

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.