Nice! Going solo for your first jam is imo a good idea.
My first experience in a team (Game Jam #5 or #6, GMTK 2020) was very exhausting and hard. The second one (Game Jam #7 or 8, Mi and Game Jam 2020) was more cooperative overall.
So, i suggest going solo first (which you are and thats good) and later on go for a team cuz you have enough experience to manage yourself so you can spend time managing/collaborating with the rest of the team :)