Help, new with Satanism, any help appreciated :)

[rocking_gameplayer]

I have couple/few questions as I am interested in Religious Satanism from JoS, I am also interested in LaVeyan Satanism as well as their philosophy is in a way interesting to me and I completely agree with it's concepts on that we should better ourselves and should maintain spiritual strength {as I know, both are the same with the difference of the philosophy denying Satan as a diety while the religious KNOWS it is a being}, but would it be bad if I believed in both?

Thanks, in beforehand of any help.