Read. Read everything. Read it again. Think about what you read, then read more. Write it down. Tell other people about what you’ve read, about what you talk about in class. And don’t forget, everyone feels this way about stuff in college.
Even Miss H felt that way in many of her classes, all the way through undergrad and grad school, and now in her current work. I don’t even get all the hedgehog posts, so I look them up and read about them. Some of them I immediately forget because they don’t really interest me, and some I keep looking back into. I bet there’s something, though, that you know like the back of your hand- an artist, a piece of art, an idea, and that will come up and you will blow everyone else out of the water.
Until then, read.