Thanks for all your help. I ended up getting this to work:
concat(substring(NAME, 1, 1), substring(substring-after(NAME, " "), 1, 1), number(substring(DATE, 3, 1)), number(substring(DATE, 4, 1)), number(substring(DATE, 6, 2)), number(substring(DATE, 9, 2)), concat(substring(now(), 12, 2), substring(now(), 15, 2)))
And this is producing AXYYMMDDHHMM.
However, even after everything is selected correctly and 100% filled in, the field still has those thick red lines around them. Why are they there? Any way to remove them?