I found my ESL teaching course a big shock after university teaching! I would have said I hated high school curricula, but I hated them *because they weren't challenging enough for me as a teen*. I'm now coming to realise how incredibly /useful/ they were. If I were starting again from scratch I think I'd pick history and maths over English, but with the degrees I have already, history+english it would be. Which are definitely not the most in-demand subjects in my home state in Aus, so, yeah. The ESL qualifications would be something I'd lean into heavily.

Retraining looks like quite a ways off, though. I've got this year of ESL teaching, then a research thing for a few years, and then I think if I really want to prioritise high school, I'll try to get onto the Korean govt english teaching program, for high school classroom experience with my ESL qualifications.