Find Your First 100 Users

My product: [product] built for [target audience] to solve [problem]

Help me find my beachhead — the specific niche I should go after first. Suggest 3 user segments that score high on all of these:

- Pain is severe and urgent, not just a minor inconvenience
- High intent to pay right now, not someday
- Likely to refer others if it works
- Reachable through a specific community, channel, or event

For each segment, describe the specific person (job, situation, how they'd use this), and tell me exactly where to find the first 10 of them.