Check out the Glen-L sail boat plans. Lots of them.

https://www.boatdesigns.com/departments.asp?dept=12

The pictures are the Glen-L 15 foot sloop I built in 1965 and it was a very good family boat. I could add a motor to it for fishing also. I covered it with fiber glass and polyester. I had Dracon sails made in Hong Kong and the eyes put on the sail as you can see in the second picture and I named my boat Ghost. I added the cabin roof that could be taken of easily if need be. The plans had full size patterns to trace around and the boat was made of 1/4" plywood as I remember.

John