Galaxie22, Here is what I would do with your new boat project.
First before doing anything else is, take pictures of everything and anything NOW. And from every angle you can think of. Then make a sketch of your boat and measure everything and post those measurement on that sketch. The more measurement you do now will absolutely come in handy later on, guarantee!
I made a little grid sketch and measured about every foot or so across the hull for later on. Then build a cradle for the hull. Nothing fancy but it has to hold the hull in position while you remove the guts of the hull and replace the transom, stringers and bulkheads. It keeps the hull from splaying out of shape as you do the work. If it gets out of shape, then your cap won't fit on anymore after you install the new wood and fiberglass. You will thank yourself for that cradle as well.
Once you have it on the cradle, time to do the demolish work. Everything and anything that is wet, rotted and dark colored wood needs to be removed. Again, measure and pictures before doing that.
Once you get it gutted and emptied, then it is time to rebuild. But grinding out the old fiberglass it the worst work you will have to do. It is absolutely dirty, nasty, itchy, smelly crappy work. But we all survived doing the same and proud of our efforts for sure. Read some project threads and get an idea what is involved.
If I can do it, anybody can. I didn't have any idea what to do as well. And I did it! You came to the best place to get help ideas, and assistance for anything. Let's get going...