"I’m working on launching a digital productivity planner on Gumroad and need a clear, step-by-step roadmap to bring it to life. Break the idea down into actionable tasks with a realistic 4-week timeline for each phase. Outline the resources needed such as design tools, email marketing software, and a Gumroad account, specify essential skills like Canva design, copywriting, and email automation, and highlight possible challenges like slow email list growth or design revisions I might face. The final plan should be well-structured, easy to follow, and geared toward smooth and successful execution."