This will be my first ship build...received as a birthday gift today very curious about why there are two identical small packs of plastic parts containing planes motor boats Ect, why?

They are bit better substitute accessorie parts given for parts in kits trees. Those are standart accessory trees, you can met same in all brands in 1/700 scale.

:| looking at the deck of this ship I am trying to figure out how to paint or airbrush all the details that are not deck brown....wow! how am I going to mask such small parts

Yep, just mask them.

I do have some experience with ww2 aircraft and am looking forward to learning about warships.

Well, same here

I have ordered some very thin Jammydog masking tape that is as wide as .5 mm,

Aizu has some more thinner. Please check www.hlj.com

I have a high quality airbrush and compressor.Any reccomendations on tutorials?
Thats great. You will see benefits of that.