I am about 90% complete on my Essex. I think you are off to a wonderful modeling experience. Some pointers:
-PE parts will add remarkable detail to the model. The are worth every minute spent on them.
-Ships take much more time to build than aircraft because of the size and complexity. Be patient; expect to take months, not weeks to complete.
-Options for originality abound: open hanger doors with aircraft inside, deck -side elevator down with an aircraft on it, selection of radars depending on the period, camoflage painting (adds significant time but well worth it).
-To inspire you, go see what the pros have built. My favorite is Kelly Quirk's Yorktown on modelwarships.com, go to gallery, carriers, and find his photos.
-Studying the history will show you the differences between Essex's. As a history buff, I bought every reference I could find.
-Some PE parts are too small (less than 1/8 inch) are too small for my skill, so I left them off. No great loss. Things like railings and antenna towers are easy. Have a good bending tool (my favorite is EtchMate--but expensive) to make life easy for you.
-Be sure to check fit before glueing. I had particular fit problems with the hanger-to-flight deck side panels and the flight deck itself.
-Jeff Herne and others will help you all the way.
Good luck!!
Chris