@Slowslowreader I know your dilemma because I got a springer puppy at age 62 and I WFH and it was very stressful. He's not my first springer so I was aware, like a collie, that it's not a lap dog who can be walked around the block once a day. However I had forgotten how much hard work a puppy is.
Without family back up it will be very difficult, all of my family offers dwindled away once the novelty wore off or they had other priorities. What is your lifestyle, will a dog restrict you? A lot of what we do now is affected by having a dog.
Far from WFH with a puppy curled at my feet, my days were spent scattering kibble on the floor with one hand while trying to take a work call, walking around the house with a puppy hanging off my skirt, and crying (me not the puppy) My DH was also suddenly hospitalised for a while so I had to do a lot of it on my own.
I took regular breaks from my work to take him out, to train and stimulate him and it was tiring. I realised that despite WFH we needed a dog walker, trial and error until we found the right fit and now 4 times a week he goes on group walks in woods and fields. We are all better for it. He is also out every day with one or both of us.
He is 2 so I will grow old with him, he costs a fortune in food, vet bills, insurance, dog walking and adds a few hundred onto a holiday for boarding. He's well trained though, and he will often lie at my feet now while I'm working.
I will be 65 next year and will say that without family back up I would not get a puppy. I would walk someone else's or have them when their owners went on holiday.