The kit will build into a nice model in itself but by far does not represent a real u-boat interior.
Jeff pretty well sums it up with his suggestions.
The book Anatomy of a ship Type VII Uboat by David Westwood is a must if you will undertake
this project. It has all the line drawings you'll ever need; it is worth the money.
Also do a web search for CMK resin u-boat interior sections.
This
aftermarket company makes interior sections in 1:72 scale for the
Revell Germany u-boat.
Use these photos and sketches as reference; they
will help alot.
All in all this U-47 kit can be turned into a superb kit representing a u-boat in this scale.
Have a nice day and happy modelling!
Joe