Hi, complete newbie here, I am in a team of two, and I was wondering how do we submit the game? Do both of us need to join the jam and submit the game? Or is there an option in the submission to show what people you worked with in the game? Thanks in advance.

When you upload your game you can press the "More" button and click "Admins" then at the bottom you can add people and set them as contributors. That will allow them to edit the game's page and will add them to the jam entry.

sherch googel and youtube i am sure you'll find how  to do that there ^_^