Madeleine, the right books for you to rekindle your enthusiasm depend entirely on both your tastes and your reading ability. The perfect books will be engrossing to you from page one onward, and will challenge you as a reader just a little bit, never more.
Can you share your interests and educational level and/or age? Movies or TV shows you love? Maybe we can recommend something once we know you a little better.\
Edit: In light of what you've shared, let me see...
The Girl With All the Gifts, about a nice little girl who has a crush on her teacher, but only one of them is still truly human
Station Eleven, a post-apocalyptic novel with a small cast who are eventually linked to one another. (And I love that it's not set in NY or LA.)
The Road, about a father and son trying to make it in a post-apocalyptic world in which most of the survivors are willing to do whatever it takes to live
Oryx and Crake, a post-plague novel by the author of Handmaid's Tale, pretty easy reading
World War Z, ever so much better than the movie