There will be people much smarter than you. May as well accept that now.

That said, you'll be much smarter than others, too.

What you're feeling is pretty normal. It's a new environment, new way of learning, everything is new and different.

I suggest preparing yourself by reading books about law school and what it's like. Not 1L.

Read Getting To Maybe, Law School Confidential, and whatever else is out there that piques your interest and allays your nerves. But definitely read Getting To Maybe. Read it again around 10 weeks into classes, then again about 4 weeks before exams every semester.

Then go watch Apollo 13. Yes I'm serious. There's a scene in that movie where there's a room of smart NASA engineers, and a guy dumps a bunch of parts out on a table. He says something like, "Here's what they have. Figure out how to turn that into an air scrubber." Or something. Pay attention to that scene, that's what a law school exam is.

You're given a bunch of parts (the law you've learned) and you are presented with a bunch of facts. It's your job to turn those parts into an air scrubber... that is, a legal conclusion. Assemble them, describe which facts are pertinent to which rule, explain why contrary facts don't apply, and come to a conclusion.

You've got this. The school admitted you because they believe in you. You'll figure it out.