In Tracker, you can look at a plot that will show your ARM and VEH requirement .vs. production for all units schedule to arrive. Be sure that your production line is above the requirements or those units will not arrive full.
If you intend to use kami's, and it is a good strategy for me at least, you will want to have several thousand planes in your pools. Anything that can carry a 250kg bomb and up is a good candidate (Ann, Mary, Sally, Helen, Kate, Val, Oscar, etc.). Numbers matter as you simply won't be able to take on the CAP over the ARMADA. You look to send +1000 planes on a one way ride. So, you get about 6CV's per 1000 planes. How many CV's are you looking to take out? Me? I plan on at least 4 major attacks, or 4000 planes minimum. I figure that with 24 CV's out of commission the allied DeathStar Armada can't support any more amphibs ... that's the plan. 4000 planes means I have to start building in '41.
You need enough to match your planes. You don't need much training though ... LowNav in the 50's is my target for kami's. Sure, 70 is better, but I generally cannot get them that high B4 they are used.