You haven't looked very hard. The fact that you think the fee for joining the COS is $100.00 gives me a bit of a hint regarding your reasearch.
Satanism was codified by Dr. LaVey. All else stems from christian beliefs, and devil worship nonsense.
Satanists do not worship an outside entity, as they do not exist. Satanism is not a system of beliefs, it is a religion of knowledge. You either know or you don't, and if you have doubts, you investigate, study, research and experience until you do. Luciferianism and all the rest blindly follow the idea that some entity needs to be worshipped, and entails believing in such things.
When you actually read The Satanic Bible
and the essays contained at http://www.churchofsatan.com
you will have a better understanding of the difference.