You have good takeaways. Gamejams seem like something that's done in a flash - you give it your all, and you either come out on top, or you don't. In truth jamming is a long game - you try, you fail, you pick up the pieces, and learn to rearrange them in a different way - not even during one jam, but months and years. It's quite the journey :).
Congrats on picking yourself up despite the intial failure!