As I said earlier the Didi 34 is a neat boat. It would be a great all around boat.
As to building a ''Laser'' in plywood, that is out of the question. You could build an OK Dinghy
which is a trainer for the Olympic Finn and was designed for plywood construction. When I owned one in the early 1970''s the plywood boats were competitive with the glass boats, but I am sure that is no longer the case. These were really nice boats that would teach you a lot about boat handling and like the Laser give you abs and thighs of steel.