As a solo founder, I found startup school invaluable. It really helped keep me honest with myself to discuss what I had done and what I will do at the weekly office hours.

I would recommend Startup School to any startup but if you're a solo founder then I think you will find the weekly office hours especially valuable.

Here's my presentation: Pingy is a desktop app to create, share and deploy websites: https://www.startupschool.org/presentations/373