Sir,
If your grandson wants to pursue the USAF pilot life, PLEASE help him find a fighter guard unit.
Great resource.... https://bogidope.com/
There are a bunch of students in SUPT right now that are “off the street” guard and reserve members. In the good old days, you had to enlist in the guard or reserve and maybe, eventually, post bachelors degree, your guard or reserve unit would send you to a commissioning source and then UPT.
Not any more. SUPT has numerous newly minted guard or reserve 2LTs. All of these kids I have spoken with had at least a private pilot certificate (many had their private and instrument rating) before they applied to several guard units. Bottom line, active-duty is a clown show. Go Guard.