I am now an experienced Ceremonial Magician. However, when I was fourteen years old myself, I got turned on to the occult not through reading occult books per se, but through Call of Cthulhu role-playing game, and the fiction of H P Lovecraft.
This is not so crazy as it may sound, since because Call of Cthulhu is based in a fictionalised version of the real world, the creators actually included a lot of historical data of real-life occult organisations and personalities such as Aleister Crowley, Dion Fortune, Israel Regardie, the Golden Dawn, etc. Because this piqued my interest, I remembered them when I came to researching the occult seriously when I was older.
Indeed, several serious occultists I know claimed that they were first inspired to take up the dark arts after reading Dennis Wheatley novels. Dennis Wheatley actually met Aleister Crowley, although he was a bit of a hypocrite in that he told his readers not to get into the occult real-life, as it was a sure path to be enmeshed by the powers of darkness, etc.
So yeah, if you do your research, you will probably find that a lot of fiction is inspired by genuine occultism. A lot however is not. The one thing I would advise against doing is watching The Irregulars. This is probably one of the worst programmes out there when it comes to historical accuracy about occultism. Or about the Sherlock Holmes universe. Or indeed about life in Victorian England generally.
(NB: if you are on Netflix and you want to watch something decent about the occult, try The Midnight Gospel instead).