Doing a jam is always full of challenge and doubt.
My first one was the GDTV jam 2024 with over 1000 submissions. I honestly thought my game would never get looked at, or get any feedback.
What I found though is that people will still look at it, rate it and give feedback. Even if it is simple or unpolished.
The communities in the jams are always what brings me back. A few of my followers on itch are people I communicated with in the jams I've been in and I've encountered a few of them in other jams as well.
There will always be doubt, but the majority of people in the jams are in a similar position. Trying them out for the first time or using them to learn new systems, mechanics and ideas.
We all want to win and make the best game, but even if you don't make what you want, you won't be left behind. There are always some people that will play, rate and give feedback. I like to think I'm one of those people and I always try to give feedback that can be useful.