If you haven't played the games the show might be even better for you since you won't be annoyed by some of the character's appearance. Moreover the series starts in the same moment as the books (games take place after the books) hence you won't miss anything. Only issue is that if you didn't read the books the plot might be slightly hard to follow as the creators of the series decided to launch 3 different timelines at the same time, used exactly the same actors with no characterization change and literally no post processing difference like HBO did with GoT. I swear I had to refresh the plot from the books/wikis a few times during watching the series, because something didn't fit.
Ultimate tip about Netflix. Its easy to cancel so you can just buy a month, cancel immediately, watch the Witcher and forget about the service.