I attended at least few gamejams both online and stationary and once it's close to the 1st day of the jam I am getting anxious. I bet that's not only me. I always think that I don't have necessary skills to create a game in 48/72h and I can't even draw or model proper graphics. There's thousands of better programmers than me.

But in the end all of these doesn't matter. I start with a project template and a pencil. I draw concept. Write a small document and then things sort out.

So if you ever have thoughts like mine. Don't worry you're not alone. If I can do this then you can do this as well.

Good luck!