I was a busboy and made drinks at a fast food restaurant for almost a year, and while I was fine when things were calm, as soon as business picked up, I really struggled to keep up; I made mistakes on the drinks and couldn't clear the tables fast enough, I really hated it there and started developing severe anxiety regarding my work. Being the head of a busy restaurant, primarily responsible for all of the orders that are going out, will be ten times as stressful as that, however, if your son works well under pressure, and he's really determined to work at it, then there's no reason he shouldn't at least try. If he can find a job at a place that rarely gets busy, say in a very small town, that might be the best place to start until he gets a feel for how the business works.
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"Survival is insufficient" - Seven of Nine
Diagnosed with ASD level 1 on the 10th of April, 2014
Rediagnosed with ASD level 2 on the 4th of May, 2019
Thanks to Olympiadis for my fantastic avatar!