Some good advice here. I would just follow his lead as to what kinds of adaptations he needs. I think in these early days of learning to adapt the most critical thing is for you to not be fearful or over-babying because he will pick up on it and become insecure. If you act like it’s an ordinary day, an ordinary walkies etc, then he will also think of things that way. Protect him from actually injuring himself, but otherwise let him figure out how to get around on his own.
I’ve not had a blind pet, but my female greyhound just turned 14 and has been having increasing mobility problems. We’ve tried things like carrying her upstairs to bed at night, but she won’t have it. She’s an opinionated little lady, and very tenacious so we’ve learned to suck our hearts in when she wimpers at the base of the stairs as she makes three or four apparently-painful attempts before she finally clambers slowly up. I also tried to train her to use a pet ramp for the 4 steps to our front porch but she wouldn’t have any of that, either. (We met her in the middle by changing her walkies to going through the garage where it’s only two steps.)