When can I watch The Witcher Netflix series?

I started reading The Witcher books a few weeks ago. I have now read "The Last Wish" and "Sword of Providence". Can I start with The Witcher Netflix series without spoilers?

The first season of the series effectively covers all of the short stories that have been published. If you want to read the books impartially, you should do this in advance.

Yeah, you can. The series only covers these two books. The novels should then come from season 2 onwards, it looks like.