This is my first game jam if I join and I'm wondering if it would be a good experience to make a game by my self?
I have almost 2 years experience but 3-5 moths of godot experience for refrens.
It's totally doable! Especially for a 10 day jam!
Just make sure you go for a simple mechanic that you can start testing and get working early - then you can build on top, adding stuff to make it fun! If you scope too high from the start, it can become really overwhelming, so keep it small at the beginning!
The biggest hurdle I found when creating a game alone was knowing when to stop. I kept on coming up with ideas and learning new ways to make things more efficient that I wasn't making real progress on completing the project. I had to edit myself and say "I'll write it down and add it later AFTER I get the basic components I planned for complete".