Best communities for solopreneurs?

It depends on what you want to build if SaaS and digital goods are your game. #1 Producthunt #2 https://www.indiehackers.com/ #3 https://kern.al/ The entrepreneur Reddit is, in my opinion, not that valuable. What I always recommend is to follow those who you deem as wise on LinkedIn or Twitter.

Also, the Time Ferris Podcast is fantastic!

Developer and SEO

I'd like to recommend The Solopreneur Community on Facebook (https://www.facebook.com/groups/...). Full disclosure, it is hosted by my company, LifeStarr. But there is no selling/pitching allowed, just awesome solopreneurs helping each other. It's free as are the associated events.

Check out this leadership solopreneur community called SoloGrit - https://www.sologrit.com It's a community for solopreneurs that specialize in leadership roles like Fractional Executives, Consultants, Coaches, and Advisors. Great place for startup founder to get connected.