Since he's just starting, just have him use something like an upgraded starter AC.
Something like
head S2, core U3, arms GIBBON, legs S2, G91-VULTURE2-ANANDA, FCS MIROKU, the R2 rifle, a laser blade, the starter radar, and a basic missile pack such as the starter missile or SATYROS.
And then you can slowly introduce him to the different weapon types. Have him start with rifles, then machine guns, then hand guns, then bazookas, then sniper rifles (although sniper rifles and bazookas may be hard for him right now due to their small lockboxes), and then energy weapons and whatever else.
That should be simple enough for him to get to know some of the basics.
Something like
head S2, core U3, arms GIBBON, legs S2, G91-VULTURE2-ANANDA, FCS MIROKU, the R2 rifle, a laser blade, the starter radar, and a basic missile pack such as the starter missile or SATYROS.
And then you can slowly introduce him to the different weapon types. Have him start with rifles, then machine guns, then hand guns, then bazookas, then sniper rifles (although sniper rifles and bazookas may be hard for him right now due to their small lockboxes), and then energy weapons and whatever else.
That should be simple enough for him to get to know some of the basics.