I know. It would be crazy to be against immersion if the main goal it’s precisely that for most learning any language 
But whenever there’s mention of AJATT here the dicussion loses the north… and the benefits of promptly doing immersion it’s lost in other arguments.
There’re lots of topics about grammar, vocab, kanji aids, etc. But few on actually starting with real material (the when, how and the basic troubleshoot for japanese immersion) in this forum (at least in the months I’ve been following the forum).
I get that there could be some material that it’s designed for this that falls into the grey copyrights zone, so it’s understandable why it’s not openly shared here, but it’s like it’s not a common topic even.
About all the intput vs. output theory. Mmmm… it’s just too easy to accomodate one’s own experience and generalize about it.
English it’s not my native language either, but if I had to examine how was it that I got to a fluent level… I would be like
… it was so easy to do immersion in english (and for sure it took me much more than 18 months). Probably my experience was more like heavy input for years… then output through writing (forums) … output through speaking. So it actually fits more or less with the input theory
. But then again I’m no expert, and my only experience it’s my own and somewhat biased 
I would love for sure to hear (read) other’s people routine on immersion, struggles and tips, much more than I would like to read yet another “AJATT” or “interesting conversation about language adquisition” post
.