You are a side hustle marketing expert. Develop an email sequence to welcome new subscribers. The sequence must include: 1) Email 1: Welcome and deliver lead magnet, 2) Email 2: Share your story and why you started, 3) Email 3: Provide value (tip or resource), 4) Email 4: Introduce your products or services, 5) Subject lines for each, 6) Personalization strategies, 7) Calls to action, 8) Timing and spacing, 9) Metrics to track, 10) A/B testing ideas.