How to join Avalanche, asking for a friend

I’ve been doing some Final Fantasy VII lore research for my Aerith story while trying to figure out the timeline of events prior to the beginning of the game. Like, how old was Aerith when she and her mother escaped from Shinra in the Remake timeline, and when was she first introduced to the church in the Sector 5 slums, that sort of thing.

What I ended up finding, on an absurd level of detail, was Cloud’s timeline. He was recruited by Shinra when he was 13, and he left for Midgar a few months later, shortly after he turned 14. Apparently, recruitment at this age is common, as joining the military is like going to high school. If 14yo kids don't join Shinra in some capacity, this is when they find a job and start working full-time.

Not much to say about this, besides damn. That’s fucked up.

Also, apparently the game uses the Western calendar dating system, with Cloud having been born in 1986. It’s weird to think of him being my age, but I guess FFVII is technically historical fiction set in 2007.