I might actually try a Godot one. I've been wanting to stop waiting for Godot, and just get on with learning and making. (Sorry... bad pun, but I wanted to make it, so there)Gotm.io
has a monthly jam that lasts 10 days (two weekends plus the full week between them), so it's pretty relaxed compared to traditional 48-72 hour jams. Seems like the perfect opportunity to get started without too much pressure.
And as an added bonus, they have money prizes for the top submission(s)!