Here are a few general game jam tips that i've come across that are super helpful:
1. figure out a good workflow, everyone works differently so this is something you'll have to figure out yourself.
2. don't rush yourself too much, you will end up making more mistakes that way
3. release whatever you have by the end of the jam, even if it isn't finished, you can't receive feedback if you don't release anything
4. game jams are about learning and growing as a developer, don't go into one where your only goal is to "win"
5. start with a small idea and only add on to it when you've implemented that idea so you don't end up overscoping your project
Good luck in the jam, and have fun!