It's a bit of a gamble whether your teammates will give up, lost interest or just abandon the project sooner or later. I feel like doing it with a small (4-6) team would be best to avoid that, as well as talk with them and ask about their expectations regarding commitment and results.
I made a team myself after being part of 2 other teams where people didn't seem all too motivated, so can definitely understand you wanting to be on your own. If you can do 3D art and/or sound design, I'd like to welcome you to my team! We are 5 folks right now (of all 4 disciplines) and I'm having a good feel about it. I'm definitely looking forward to taking this jam seriously while having fun and learning as much as possible.
Regards!