Mike F6F is right - skip the water base if this is your first ship, especially in 1/700 - although an aircraft carrier is a good choice in that scale because it at least seems a bit bigger. The auxiliaries I usually build are only about 8-inches long!
Other than that, I would adopt the KISS principle - try for a decent fitting of all parts, minimizing seams, etc. If you want to give photoetch a try, go for the comparatively bigger pieces like the radar antennas and skip things like railings and 20mm cannon shields. If you want to tackle a dazzle camouflage scheme, go ahead, but don't sweat getting it exact. This first build is going to be a learning experience, you can worry about "exact" with the next one, if you desire. Oh! And have tons of fun with those itty-bitty airplanes!
Learning to build ships in 1/700 is an incremental process, as illustrated by my efforts to date. The first is my first model in over 30 years, a 1/700 resin Victory ship kit:
The second is my most recent finished creation, a plastic Japanese seaplane tender:
I keep the first one around to remind me that it took awhile to get the look that I was after. The important thing is to build the model. Everything else will follow in due course.