I have a little experience from repairing and rebuilding traditional clinker built boats.
The way I learned it everything starts out in the woods. Looking for good plank trees and suitable grown crooks and a keel and some gunwales. A few hardboard patterns help the beginner a lot when looking for suitable crooks.
If I was to build a boat from scratch I would look around for an old rotten boat with a good hull shape. Such boats can be had for free. I would patch it up temporarily and test it on the water together with a person who has experience wuith traditional boats. If it performs okay I would haul it home and use it as pattern for a new boat. Build the new boat besides it.
For me with my lack of boatbuilding skill it would be totally impossible to get a hull shape right when taking it from a flat piece of paper. However I found it rather easy to duplicate an existing shape which I could touch and feel and doublecheck through three dimensional measurements. That was what the repairs were all about.
Clinker building is quite the opposite of other boat building methods. Because you build the skin first more or less freehand though sometimes with some help from a few moulds. Creating the shape in three dimensions. It is a lot easier than people say but you are forced to learn a whole new way of thinking.
Traditional clinker building is a very cheap boat building method when it comes to materials. I think I could build and finish a very nice 22 foot hull for less than 600 euros in materials. The culprit is the great time consumption.
A very traditional way of reducing time consumption is to hardly use any sandpaper. A boat will inevitably be dinged and dented so really there is no need to aim for perfect surfaces.
Make sure you have time enough to build the boat before you start. Far too many good boats become awful botchjobs because the builder is in a hurry. Almost as many are never finished.
Here are a few youtube videos showing clinker boatbuilding:
https://www.youtube.com/watch?v=6o4Ilg2LICM
https://www.youtube.com/watch?v=j_GHq4tgskA
https://www.youtube.com/watch?v=8yCU9fp9kj0
https://www.youtube.com/watch?v=pbaCdbDkkcs
https://www.youtube.com/watch?v=sZQAJyWF6MM
The English way of doing it:
https://www.youtube.com/watch?v=J0yFnF5Dx0s
https://www.youtube.com/watch?v=SiZavgG20qA
https://www.youtube.com/watch?v=ZiWvhIbB7JU
https://www.youtube.com/watch?v=YKr_uljrhdM
Good luck!.....I look forward to seeing the Froggy Boat come to life!