Hey! Just like you, I'm pretty new here—it hasn't even been a year since I created my itch.io account. The only jam I had time to join and assemble a team for was the Spooktober VN jam, though unfortunately I couldn't complete my project back then. I haven't officially released a full game yet and I consider myself a beginner as well :)
I read that you struggle with project management and scoping, and I can definitely help you with that! I have experience managing and building a team from scratch, as well as ideation, writing GDDs, and project leadership. My core skills are Pixel Art, ideation, and playtesting.
For this jam, I'm in serious need of a programmer and a music composer, so I think we could make a great team together!
You can check out my work on my profile (the asset packs there are completely free to download if you want to take a look).