Our last dog, Shadow, was a Corgi / Schipperke mix, who developed glaucoma when she was about 5. By the time we discovered it, she was already blind in one eye. She was then on glaucoma meds for several years, until she finally went blind in the other eye, as well.
She still got around well, though the fact that her sight loss was gradual may have come into play there. She’d occasionally get turned around in the house, or in the yard (we have a small, fenced-in yard), but generally speaking, she almost always seemed to know exactly where she was. As a kindness to her, we didn’t rearrange the furniture in the house.
One piece of advice to the OP: look for any place in the house where there might be a drop-off, or a way that your dog, if he were to get a little disoriented, might accidentally take a fall off of something. Shadow once took a scary fall off of our back porch, when she turned right (to go down the stairs) about 3 feet too early, and somehow squeezed under a railing. We blocked off that opening after that, but it was a scary moment.