It’s going to take a lot of money and time.First you have to get all of the wood out.Take pictures as you go.Make sure you brace the hull so you don’t lose the shape when all the support is out.Assuming transom is ok,get interior absolutely clean.Next you make a pattern for each stringer and cross piece.Get as near perfect fit against the hull as you can.When the pattern satisfies you make the real stringer.Repeat.When all the wood pieces are ready,Mix some thick epoxy to bed them.When that has cured glass them all in place.To be brutally honest it’s cheaper and easier to buy another boat or build a new one.