I also had only played the witcher III when I started the books. The games are all set after the events of the witcher saga (books), and are honestly just really really good fan fiction based on the characters (like, really the best fan fiction you could think of), so you can feel free to just read the books.
If youβre not a big reader (if I understand the note about dracula correctly) the witcher audio books are really well done, and the stories lend themselves very well to being listened to.
Finally, I could write a treatise on the failures of the netflix show, but it would all be old newsβabout 10% of the show is accurate to the stories told in the text (and the text is so much better), the rest is a bunch of made-up nonsense that serves nothing other than to muddy the narrative.
In short, yes, read the books (also why do people need to ask advice about reading books these days. just read books).