In my opinion the starting error is relying on a shop.
The goal of a shop is making money selling equipment.
There is an evident conflict of interest if they also organise courses.
My suggestion for someone wanting to begin scuba diving is to search for local clubs and ask them.
If no club in the area, use Facebook or other social media for getting in contact with local divers and ask them.
If there is a club, there are good chances they organise courses at much smaller cost than for-profit agencies.
If instead you have to rely on the local divers community, follow their suggestions: they will point you to good instructors, possibly working outside any shop.
Or to some serious dive operator, providing both guided dives and tuition (these are easily found in nice diving locations, but of course do not exist far away from diving spots).
There is just one case when I suggest to buy a cert card in a shop: you are scheduled for a nice tropical vacation and you need to get the card in a weekend just before leaving.
But do not expect to be trained by a shop. They are just selling you the card, taking barely the minimal effort allowed by the agency issuing the card.
I am not saying this is a fraud, there can still be a reasonable value/cost ratio in this purchase. Simply one should not expect to get proper tuition, when you are just buying a card from a seller.
The problem here in the US is the shop IS the place where everyone goes for classes, at least with the mainline agencies. Yes, there are exceptions like private GUE instructors and other private instructors, but that is not mainstream.
Instruction doesn’t happen through clubs here.
From what I remember of local clubs is they meet once a month at a pizza joint and drink beer and eat pizza and talk about diving like their latest trip to some exotic and wonderful place that 99% of us will never be able to go to.
As far as setting up local dives, yeah there was a little of that but it was mostly the core four or five people that had boats and a lot of times they were off salmon fishing instead if diving, or if they did go diving they excluded everyone else. Very exclusive structure and very frustrating for someone joining thinking they were going to meet dive buddies.
No one had a compressor, there was no active instructor, there was no big boat, nothing like that.
All they wanted was for new members to pay the annual dues so they had money to do their own thing. Borderline fraud IMO.
I think the best a new diver can do is try and get certified locally through a shop that trains divers to dive in out local environment. At least in my area the diving is tough enough that they need to teach them more than what you’d get at a tropical resort cattle drive type environment.
I can’t complain about the quality of my local instruction, they did everything they were supposed to do and didn’t skip anything. I don’t particularly agree with the content especially with AOW but that’s not the instructors fault. I think the content structure needs to be revamped. I would have spent more money and enjoyed more class time/dive time learning more stuff.
All I can say is students that are really interested in knowing more, they should embark on some self study like reading the New Science of Skin and Scuba Diving, and other books, then just work like hell to find good buddies that can show you. You have to want it. It’s not like it used to be, it’s an uphill battle now to try and get past the mediocrity of what this sport has become.