OK, one last thought for you. Have you considered trying to host a training? If you have a place that has a pool that could allow you access to a group-ex room for most of the day and a pool for the last 2 to 3 hours of the day, you could host the training and get yourself trained for free.
I’ve done this very successfully. It’s how I got my Strong by Zumba, my first Zumba Gold license (I’ve now taken it 4 times), Zumba Toning, and several other licenses and certifications from other companies.
Also, as a ZES (I’m a ZES for Gold, not for Aqua), I can tell you that sometimes ZES need local contacts for cities / facilities to host them.
I hope you can find an aqua training locally, host one, or are willing to travel for one. Aqua is super fun to teach.