Our Petey is about 80 to 85% blind at this point. It happened slowly so he was able to adjust. I've had a dog that went blind a lot faster and I've fostered a dog that was completely blind after a horrific injury. It seems so much worse when they lose their sight quickly but dogs are quite resilient and they will adjust with our help.
You have received some good advice on this thread, the harness would be a must have with all those steps to negotiate. I will just encourage you to take things slow which may mean you have to slow way down yourself, and speak gently with an encouraging tone. perhaps it will help if you place your hand in front of the dog's nose so they smell you (to follow) and it just might slow it down a little in the process when you slow your motion.
I have faith you will get a routine and things will begin to "fall into place" for you and your beloved companion. Will it take some work? You bet! You seem up for it, good for you. :)
Please update us on your progress when you can!