If you mean religion
Like a cult of Baphomet?
Most pagan paths, religious beliefs and magical practices are not Satanism... a person would have to believe in Satan to be a part of Satanism (or an atheist that uses the imagery or label to turn heads). I can only assume, then, you are referring to something that is generally a part of Satanism. I said Baphomet since you said "His/Her" and Baphomet is generally considered a deity dealing with duality... and the Temple of Satan loves to put Baphomet statues in places :D.
Generally speaking, just coming up with a religion and claiming it as truth and expected others to comply, is a pretty questionable act. However, truth, epistemologically, is a subset of belief. So, you could say that, since you believe it, that it is true to you. Many people have been taken in by UPG (unverifiable personal gnosis) whenever the emphasis on it was inappropriate. So, that might be something you should be careful about.
And, Pagan is not a negative term. It basically means the religion of the people or the religion of the lower class. A term given to a religion when the religion, of the people, did not itself have a name (such as the nordic beliefs, celtic beliefs, etc). The reconstruction efforts of those beliefs or the inclusion of them in some fashion in to one's current belief structure, or practice, is what is meant by paganism colloquially. Though, in a non-judgmental way, a reconstructed belief system, is commonly referred to as neo-pagan (new pagan).
If you mean path
Maybe i read all of what you wrote wrong, which i always do lol. It would seem, then, that you are trying to construct a path instead of a full religion. The word "religion" has a lot of baggage. If that is the case, then many have, and it is something that is often encouraged. If you are trying to follow a certain deity (and not some sort of new one), research on how that deity has been seen historically. Does the deity expect reciprocation? If so, you might have to give offerings for a while before you can really hope to work with that deity. Does the deity have any animals or plants associated? If so, try to include imagery of such in your practice... etc. etc. etc. lol