Marketing is important, but like many skills, it needs to be applied to be valuable. All the books in the world won't tell you what resonates with your audience

Marketing is important, but like many skills, it needs to be applied to be valuable. All the books in the world won't tell you what resonates with your audience. Start building an email list, and post regularly, 2-4 times per month. Don't wait until you have a product. Obviously you at least need to try to have a general idea of who your audience is. As a solo founder, you'll need to have your hands in everything. That doesn't mean you'll always do the work, perhaps you can hire contractors, but you shouldn't have any blind spots. So round out your knowledge. For instance, if you're a front-end dev, learn to build the backend and the cloud essentials. (Don't use the idea that you can punt to Vercel or Heroku as an excuse - you still need a foundational understanding)