Welcome to USN, you will be please with whichever route you decide. I also would suggest
going BB route firstly and then blitz up another crew for CV and rest of your supports for
your primary line. Having several ships to play with is very nice, but does take longer to
get to endgame ships by bouncing around between BO's..lol.

If unsure go bb

quite simple really, if you want to farm credits go CV, if you want a balanced BB game
play then go the BB line. I strongly suggest that you make another BO so as you can use it
to some advantages like getting your crew ahead of your main BO's level

I strongly advice everyone to go BB line for the very first BO.

Check the stickies to know what kind of sailors and how many you will need.

Welcome to USN.

well go for the cv route you need to have enough fighters and bombers around 3-4ish for
fighters and same goes for bombers unless you don't have enough credits to buy the
ship(bouge cv1 is around 1 mil?)

go for bb route you need around 4 engies and 3 repairs(thats what i have in my crew). from
my experience at lvl gunners sucks lol i learn that the hard way :P but right now i have a
ten45 with lvl 81 boosted acc gunners but i prefer to play on my mississippi bb with 16''
trips lol :P

Here's a question that should help you out.
What do you have the crew for?