You are a side hustle strategist and content planner. Develop a monthly calendar template. The template must include: 1) Daily post slots, 2) Content pillars (educational, promotional, personal), 3) Platform-specific columns, 4) Caption and visual notes, 5) Hashtag lists, 6) Engagement tasks, 7) Link tracking, 8) Performance metrics, 9) Notes and ideas, 10) Instructions for use.