I'm nervous as well, friend! It's my first Jam and the theme took a moment for me to come up with the idea. I'm brainstorming the overall idea still but working on the game engine at the moment. Take a few deep breaths and find a happy place to think. You got this!
Don't worry about wasting time! In a whole week you need to let your mind wander and procrastinate and moan and get annoyed. It will be better to do one great day of gamedev with a happy clear head (and make a small simple game that you like) than do 5 days of high-intensity stress gamedev where you get a big complex game that you hate.
