This sounds like you'd might be a good candidate for the
GUE Rec 1 course. However, it isn't run very often and mostly just in Hawaii and Florida (mostly because that is where the instructor who likes to run this course in the US lives). But it is a very detailed and more complete course than the usual open water course and is set up to help prepare you for further tech training with GUE. So if the GUE tech curriculum fits your plans it might be worth talking to Meredith. But you will probably have to travel to do this, it costs about a thousand dollars and it takes about a week to run.
However, the other suggestions are certainly viable. There are a lot of great instructors out there, they are not limited to any agency. But there are some poor instructors too, and also instructors who might be great for someone else but are just not a good fit for you.