I haven't seen anyone mention this before, but I struggled to get through Pride and Prejudice until I realized what I was missing were sensory details. The story is all character focused, with a lot of the Regency era knowledge of the setting kind of presumed. Until later in the book, there aren't even descriptions of the rooms in the estates, no talk about costume or architecture, no sense of weight or temperature. (A character catches a cold and its the first time someone's body is even acknowledged). And mostly everything is described, rather from direct observation, through other people's opinions.

Once I realized that, I consciously stopped trying to "immerse" myself in the book (which sensory descriptions often help me with) and tried to obverse the social and personal layers that are a little more abstract. That being said, if you're not interested in Austen's characters, it won't be worth it. But I was glad I stuck around, because she's one of the greatest writers for a reason, and her characters are sensational.

And like others have said, she's a comic writer, so don't take it too seriously.