Hi Popjack...
There are plenty of books on radio control and build, they all have their own slant to method.
It might be a first call to see how others are building on Youtube and have a think on ....
plank on frame or moulded hull...!
Some build from scratch,, a set of plans and build as you go, working out when to put the prop shaft in and when to seal the hull for water proofing.
I read an article in the magazine Model Boats on how to build a 1930 Australian Tug boat, got the plans and set about the build...
Twelve months later it is still under construction.
Hope this has been of some help,
Ian