I believe one of the graphic novels was like a beginner guide on Hal Jorden like an origin story or something like that (I can't remember which one but it was on sales due to the live action film but by all means the novel itself has NOTHING related to the film!).
If you want something animated then I highly suggest watching "Green Lantern: First Flight". The other film "Green Lantern: Emerald Knight" is best to watch later, despite being the same animation to First Flight, the story/ characters are not related to that film at all. Emerald Knight serve more as a character spotlight on the other members in the Corp.
Also I find this video to be somewhat handy as in given a brief history on the whole GL history