No problem, it's my first jam and first published game.
As an exercise for myself a few months ago, I tried to make a game to the rules of another jam and found that I needed to make sure I planned to make a game I could actually make in the timeframe.
For this jam, once I had an idea for a game I thought about what mechanics I would like to implement and tried to make sure the work was something I could actually do.
As I'm generally trying to avoid premade assets, this had to include time for making the art and sound work as well.
If you want a long post, I made a post mortum / story of my experience from zero here