My .02 if anyone cares...
You’re in aviation so you (should) obviously be well acquainted with proper preparation, checklists, etc. That’s a positive for you. Don’t slack on the pre-dive preparations...ever. Trust me on this, do not let complacency get you.
Get at least a 19 cf pony. Better to find a 30 or 40, and sling it properly. A 19 can be carried numerous ways, I always mounted mine to my tank on my back. Make sure the reg is serviced and check it before and during every dive.
Even though you can’t officially take the solo course, get a copy of the SDI solo book. Read it, do the gas planning exercises and incorporate the training into all your diving. It’s an awesome course, even for someone who never wants to solo dive.
Set your limits, follow them religiously, carry all the necessary safety equipment, tell someone where you’re going and when to expect you back, and be careful.
And if you get pulled over by the scuba police....we never spoke!!!