Yo! Yes, you absolutely can. Having a team is great, and so is working alone. Being 16 is also not a problem for this jam specifically if you are able to post games on itch.io. The one thing I will say on that is that you might need to get help from a parent/guardian to set up your itch account to take payments, however that's usually pretty simple. Aside from that, you are all set, welcome to the jam!