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 I had not come across Automatic Language Growth( ALG) previously. Here's a short summary on YouTube.  Below, I've copied and pasted the description of that video:

Automatic Language Growth is an effortless, comprehensible input-based approach to second language acquisition. Its goal is for adults to speak new languages as fluently and as accurately as native speakers. ALG is based in part on Krashen's Natural Approach and ideas about comprehensible input. Two main things that make ALG different from other comprehension-based methods are: 1) It has a much longer "silent period", where learners first just listen for many hours and gain understanding of the spoken language, before speaking it much or doing other things like reading, and 2) Its focus is on providing understandable experiences in the target language that create lifelong memories and are so compelling that learners forget that they are acquiring a new language, yet still learn it subconsciously. ALG was developed by the American linguist Dr. J. Marvin Brown and mainly implemented to teach Thai in the AUA Thai Program in Bangkok, Thailand from the mid-1980s until 2020.

I find that my approach has a lot in common with ALG.