Hi
Welcome to the world of model boating, its nice to see that you have outgrown those noisy flying things and have settled instead for the peace and tranquility of floating things (pipe and slippers are optional)
It does’nt look as though anyone else will answer your question even though we have all been through the same process. I dont know about the billings norden or how complex the build might be.
Have you thought about paying a visit to your local boating lake or model club, dont be put off by the odd bit of gold braid, I imagine that aero clubs are the same (we all suffer)
You will see all kinds of different models and whats more you will meet lots of friendly people who will be only to happy to help and advise you on your choice.You will find that model boaters are one big happy family who just love to talk about their hobby (in fact we don’t shut up) they will also point you in the right direction for the best deals.
As for myself I started just like you with plastic kits and moved onto bigger kits, my first "real model" was a perkasa MTB this was an all timber kit that was quite easy to build and very forgiving as it was quite basic and had no small parts. The build went very quick and I soon had a reasonable boat on the water, its only downside was its length, at 4ft long it was quite a big model and required a large area to build it in, the upside was that people have built so many different versions of this model that it did not have to be scale perfect.
I hope this is of some help.
All the best
Paul