Non-negotiables
Substantial hands-on time, not just watching: practice skin, then live models worked under direct supervision. Small groups (a trainer cannot supervise 20 needles). Explicit bloodborne-pathogens / infection-control teaching, or a clear pairing with a certified course. A curriculum covering colour theory, skin/anatomy, contraindications, machine and needle theory, technique, healing and aftercare, and correction basics.
Check the trainer
Ask to see the trainer's own healed work (not fresh, not students'). How long have they practised on real paying clients? Are they still practising, or only teaching? Do they have any reprimands? Talk to past students about the reality versus the sales page.
Check the fit for licensing
Confirm the certificate and hours will actually satisfy your state/council/country's practitioner-licence rules and your intended insurer. A beautiful course that your regulator does not accept is a waste.
After the course
Look for ongoing mentorship, a way to submit healed cases for feedback, and a realistic message that you are a supervised beginner on graduation, not a finished artist. Be wary of '2-day master' claims.
