How to Choose a Junior Golf Coach: A Parent's Checklist

What to actually ask and look for before committing to lessons, beyond just picking whoever's closest.
PGA accreditation is a reasonable starting filter
In Australia, PGA of Australia members complete a structured accreditation pathway, which is a reasonable baseline filter when you don't have another way to judge a coach's credentials. It doesn't guarantee a great fit for your child specifically, but it does confirm a level of formal training that a casual "golf enthusiast offering lessons" listing may not have.
Ask specifically about junior coaching experience
Coaching adults and coaching young children are different skills - patience, the ability to explain concepts in age-appropriate language, and a games-based rather than purely technical teaching style matter enormously for keeping a child engaged. When speaking with a prospective coach, ask directly how much of their work is with juniors specifically, and what a typical junior lesson looks like.
Watch (or ask about) an actual session before committing to a block
Many coaches will let you observe part of a group session before signing up for a term of lessons. Watching how a coach talks to kids, how much actual swing time each child gets in a group format, and whether the group's skill levels are reasonably matched to your child will tell you more than any credential list. If a coach won't allow this, that's worth asking about directly rather than assuming the worst - but it's a fair question to raise.
Fit matters more than reputation
The most credentialed, highly-recommended coach in your area isn't automatically the right fit for every child. A naturally competitive kid and a shy, easily-overwhelmed kid often thrive under quite different coaching styles. It's reasonable to try a coach for a short block and switch if it's clearly not working, rather than assuming the problem is with your child.