I'm undecided on which niche to focus on—health tech, digital wellness, content creation, creator economy, e-commerce, direct-to-consumer, digital education, or e-learning. Should I try all four niches or go broader with an AI content repurposing service?

I think you're mixing up the niche with the service you're providing. You can treat the AI content repurposing service as a layer that sits on top of any of those niches. In practice you cross‑multiply the service with each niche, creating separate tests for each combination. For example, you could run the AI repurposing service for health tech, e‑commerce, creator economy, and digital education. That gives you eight service‑niche combos. Then you add three outreach methods—cold DMs, cold email, and ads—so you end up with 8 × 3 = 24 distinct experiments. You can run these in parallel, using split tests in your campaigns. When choosing which niches to prioritize, I usually focus on digital, high‑ticket opportunities with low regulatory friction. Health tech is heavily regulated, so I’d avoid it as a beginner. Creator‑economy services, e‑commerce/DTC, and digital education/e‑learning are less regulated and align well with a high‑ticket, digital service. The goal is to accumulate experience quickly while minimizing regulatory hurdles, so pick the niches that let you test fast and scale.