You were a non-reader, preferring to watch movies and series rather than touch a book.
But then, someone recommends a novel they think you’ll like, you flip through it and love it!
In case it’s the first part of a trilogy or series, and you decide to read the whole series (or at least read all the parts you get your hands on and, in case you can’t get your hands on the last ones, you decide to look for spoilers on the internet).
That was my experience with Warriors by Erin Hunter.
What’s yours?
My first series was probably Tom Clancy’s Jack Ryan books.
I read a lot of Andre Norton back in the day as well, but I think they were all one-off novels. Been a while.