Yes.
Let me help.
The occultists of the 19th and early 20th century (the term first appeared in the 1840’s) were, by and large, harmless. They didn’t go around killing people and starting wars, and were in no position to do so. Few of them tried to gain any real political power or influence over society at large - even fewer succeeded.
Not only were they themselves generally harmless - I’d rank 'em somewhere between girl scouts and librarians - but their ideas were generally harmless as well. Some groups were Christian (L’Ordre Martiniste), others were not (the Theosophical Society), and many were kind of all over the place (The Hermetic Order Of The Golden Dawn, the H.B.L., the O.T.O., etc.). But none of them worshipped evil, or the Devil - and none of them advocated war, rape, murder, human sacrifice or anything of the sort.
At worst, a few groups went in for some version of “free love,” or drug use, or (in the case of the Theosophical Society in its wild-and-crazy early rock’n’roll phase) “the abolition of Christianity in favor of freethinking humanism” - concepts shocking to the Victorian public ca. 1875, perhaps, but not so much today. Or, well, at least not to me. 
As for “Satanism,” the first person to openly worship Satan as his god was an obscure Danish dairy merchant. He was seen as half-crazy, an object of ridicule, and he died in abject poverty. His influence over world politics was non-existent, and he gained exactly zero followers.
Half a century later, in the 1960’s, the Americans came up with their own kind of “Satanism,” completely different from the Danish variety, stripped of all theistic tendencies and, well, basically just “Ayn Rand with trappings,” as its founder put it. It got popular with rebellious teenagers and edgy musicians for a while, but it ain’t much.
Finally: May I ask what your first language is? If it’s one of the major European languages, I could probably recommend a few good, serious books on these matters. There’s a lot of good information out there, but it’s mostly in books, not on the Internet, and certainly not on YouTube. I could also recommend books in English, if you’d prefer. Let me know.