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?
I have no idea what my first novel actually was, but my ex bf was never a reader until he stumbled across “Das Jesus Video” by Andreas Eschbach. He loved it so much and I think that was the first book he voluntarily read. He was around 30 at that time.