If you don't have a book on how to build the canoe, I would suggest a copy of canoe craft, I think it will be easier for you if you know the basics of building the boat, which should help a lot in repairing the boat (IMO).
I found a decent video from Nick Schlade for removing fiberglass, which should give you an idea of what to expect:
https://www.youtube.com/watch?v=BHNHXD-g2N0
I wouldn't start at #36 though, he uses hardwood on the kayaks and the canoe is cedar, I would start at #80 only and be careful, it sands fast.
Jim has pointed out that it is easier to work on the boat if you remove what can be removed first, that makes everything easier to access and repair as required.
The hull has 2 layers of fiberglass (inside and outside), if you remove the outer one, the inner one will maintain the shape ... so putting it back on it's stations isn't required. Also as Jim pointed out, if you remove the outer fiberglass and do the repairs, you will then need to access the condition of the hull. If all the discolouration has sanded off and you like what you see ... then you can just refiberglass and be done. If it isn't beautiful to your eye, the outside can always be painted after fiberglassing ( or tint the resin while fiberglassing).
What is clear is you will have to get into the repairs before you will be able to properly access the damage and formulate a plan of attack. The first step is likely going to be removing the delaminated parts and seeing how easy the rest can be removed (IMO). If it removes easily, the best course may be to just continue on and clear the outer hull.
Then you can address the areas that need repair, the bottom crack can likely be cleaned up and fixed with epoxy, the holes will likely need some new wood .... there is more than one way to make repairs, the issue is that sometimes you have to take it apart to figure out the best method for you.
Finally, once the repairs are complete, you can re-fiberglass the hull, turn over the boat and fix any interior damage at the repair areas ... and you guessed it, that has to be assessed after the outside is complete.
Brian