1 - Go USN since USN are BEST at fighters or MN who are average at everything.
2 - You need 5-6 fighter pilots and 2-3 bombers (for a total of 8 pilots)
3 - You may want a seaman (needs high potential restore repair and fighter skill)
You also may want a support for the eventual CV6.
Conventional choicess are: Repairer restorer engineer and sonarman.
Top it off with 2 gunners and... what would be it.

i recommend to go ithing only.
either run 6-8ftrs+1-3seaman or tun 8bombers(just 1class).
if its your first cv 5ftr+3bombers(one class either db or tb!)

if u have fighter class them as ACE but dont class them as SQR leader cause then they loose trure ability!(<-km/usn only)
furthermore
good ftr nations: USN+KM
good db nations: IJN/SN
good tb nations: RN/IJN
MN is average at all beeing a bit on top of average if i am right