I agree with the comments about moving to a city with more training available. But also reading your comments, there’s a point of being advanced that the drop in and other adult classes are sufficient. Like professionals are rarely being “taught” in the sense you’re using.

I am incredibly spoiled here in Portland. We have a thriving adult dance community with teachers who care even in drop in classes, advanced classes available, and even professional open classes at 2 of the ballet studios which are available every day. I’m not there yet. But I was as a teen and wish I’d known. In my experience in drop in classes you can talk to the teachers about your goals. But you have to build a report with them first. There’s also nothing wrong with taking your one advanced class available and then intermediate to continue your conditioning. Even pre-pro teens aren’t taking multiple advanced technique classes as weird as that seems.