I think a lot of people struggle with literature because no teacher ever suggests that they ask the simple question: "Why did the author bother to write this thing? Why didn't they write recipes instead, or become a doctor or something?" The answer is almost certainly some version of the same thing: they wanted to represent a certain kind of experience to you so that you could share in and empathize with it.
Historians, philosophers, political commentators and many others write non-fiction to persuade you that this or that is true. Novels, plays, and poetry are much more about helping you think through what it is like to be, say, a smart bored woman in eighteenth-century England (read Jane Austen!) or a young prince filled with anger, doubt and a sense of powerlessness (read Hamlet!) or part of a desperately poor family in the American Dust Bowl (read Grapes of Wrath!) Literature courses are (or should be) about helping you see exactly how the author went about trying to pull off that bit of magic. Hence questions like: Why do we care about this character? What bits of oddness in the language make them come alive to us? Where's the tension that keeps us reading? (And a thousand others.)
My advice: think of authors as your friends. They want to share something strange and new with you: they are offering you a gift that they have labored over. Sometimes it's hard to get the wrapping off - especially when the wrapping is hundreds of years old! But sometimes (not always) the gift inside is so beautiful that it'll leave you grinning for weeks.
Keep reading. Don't feel guilty about not enjoying or not getting a lot of it. Sometimes a single phrase in a book that makes you go "Wow, cool, I'd never have thought to put it that way" can be worth a whole day's reading.
All the best - Richard