Haha, I had zero experience and no confidence when I started at at the lowest tier school in town. For reasons you've mentioned, and things like making a good reputation, I stayed with the school for 1 or 2 years, and became head teacher after 6 months. Educated professional teachers from the west hated having me as their boss because they were technically more qualified than me, but they also quit a lot, complained, and often refused to teach with such limited materials.
With a good reputation, I never once had to even make a CV for any of the future schools I worked with, I was mostly poached for higher and higher salaries.
By the way, I gave you the ASEAN Hive upvote, not sure if you wanted to post this in the community and/or forgot. If you want, let me know and I'll crosspost it with the @asean.hive account.
This is one of the things that in ESL in SE Asia anyway, that I believe is most important for employers and it is good that you were rewarded for it. It has been my experience teaching here that the stuff they teach in college about education are not very applicable in most ESL environments. We've had university degree in Education teachers at the schools here that were some of the worst teachers in the place, but they kept their jobs so that the school could advertise their credentials.
I apologize for not posting in Asean, I don't know how that happened. I'll pay closer attention to that in the future. Thanks!