In general, which breed is calmer and easier to train -- labs or goldens? Our labs have always been pretty laid back. We could leave them loose in the house for short periods of time without worrying about them. Then we got Amber, our golden. She is eleven months now and still as much a puppy as when we got her [except the biting is past]. She is smart enough and learned commands like sit and come in no time. But she is constantly on the move and has to check everything with her mouth. No paper is safe -- she will shred it instantly. Sofa pillows are her personal property, to be carried to her favorite den behind my recliner. I'm sure she knows better but does these things so I'll chase her to retrieve them. She loves to fetch so she must think I like to retrieve, too. If all goldens are like this, they are not for old codgers like me.
In a sense, many goldens are puppies nearly their entire lives. They mature and settle down to some degree, but not like other breeds. The one I had as a child would, upon people walking through the door, start running laps around the house, pausing only to jump on people and lick them before doing another lap- and continued this until he was around 7 years old and health problems started kicking in.
One year, he stole the Christmas ham from the table and ate the entire thing. I can remember my mother looking around like "Where did the ham go?" and checking the oven and the fridge and all the counters and then slowly everyone's eyes turned toward the dog and he let out the loudest belch I've ever heard. Then he rain away as fast as he could.
My father nearly got rid of him several times because he spent the first 2-3 years chewing on the furniture and essentially everything in sight. The dog stopped that my the time he hit middle age, but would still pull a pillow off the couch and lay his head on it from time to time.
My current golden is a year and a half. At about the year mark, I was able to give him free roam of the apartment while I was gone and he does alright. He was housetrained within three weeks of getting him. He learns some stuff. He loves car rides and behaves pretty well on them (Apart from clawing me if I have to stop petting him to execute a difficult turn or something- until I resume petting him).
But the first thing he did when I picked him out was march up to me and bite me, and he still likes to nip- and he'll still jump on people who aren't me (I consistently held his paws when he does it and it makes him uncomfortable and he stopped) when he gets too excited. He'll still throw tantrums on walks if we walk past people he wants to play with and/or he gets bored and/or he feels we've turned around too early. And he can be pushy when he feels it's time for bed and growl or bite me a little to try to prod me along. He loves other dogs, but he sometimes taunts them or tries to dominate them a bit too much-- he's definitely an alpha dog.
Goldens aren't ordinary dogs. Part of why some of us love them is that they are so puppy like and affectionate and playful for so long. They sometimes mellow a little with age, but usually not the way (or to the extent) other dogs do.
I'm not an old codger (except at heart), but I do have a lot of health problems, and it really pushes me physically to keep up with my golden. That's not entirely a bad thing- I need to move around a little bit and push through the pain some so my health doesn't continue to deteriorate (Part of why I got him was to give me incentive to take a daily walk that is as long as I can manage any given day). So, you could look at it as a way to keep yourself in gear.
If my health was much worse, though, I couldn't do it. In the earliest weeks and months, I had some times when my back would just lock up on me trying to keep up with him and I'd be laying on the floor immobile as he continued to try to bite and jump on me. I can also remember shutting me eyes for a few moments out of sheer exhaustion and having him come up to me and nudging me with his cold snout in my face like "Wake up, human!".
When I hit old age, assuming I'm still around and my health deteriorates a little more as I age, I probably won't be able to keep getting golden retrievers and will have to look for a less active less mischievous breed. So, I can understand where you're coming from, a golden may not be for you at this stage of your life.
If there's any way you can manage, though, goldens are a very rewarding breed. It helps keep young at heart, and it's refreshing to see their zeal and enthusiasm for life. And they almost always want to be petted or play tug of war with a rope or be companionable in some way. Unlike cats, or even some other dogs, you never feel like they are just using you as a source of food and never want to hang out with you. They definitely need you-- and for more than just food and water and exercise and stuff, they genuinely really love being around people and other dogs.