Game Jams can be stressful even if you do know what you're doing. If you're getting burnt out you might want to try and make a project without a set deadline and just focus on learning the basics at a comfortable pace.
That’s actually what I have been doing, so I joined a jam so that I had a deadline to work towards. In retrospect it might’ve just been such a short time frame (only like 5 days) that it ended up causing more burnout
