I read my first Jane Austen novel after watching the 1995 BBC adaptation of Pride and Prejudice. From there I read the other books – and watched various movie adaptations of each. Movie adaptations are often used in schools a culminating activity, with some sort of compare contrast note-taking work. The thing is, a good adaptation can help readers before they tackle the original, giving them the sense of the plot and characters, as well as the big ideas the work addresses.
Some recent graphic novels can serve the same purpose – giving readers access to a work of literature before they tackle the original – whether for school or for pleasure.