hello Z
In simple terms you require at least 3 clear images (side, end & plan) of the boat.
Import the images into the cad programme and then trace them………after tracing remove the images and you are left with outline drawings.
Now its down to your experience of model building to take the basic information to produce a set of working drawings.
Its not hard to do and you dont need to be a computer wizz to do it, in fact all the computer does is enable the rapid change of scale.
Hope this helps
Paul