Glad to hear you're getting "up and about a bit" Brian, and completely understand that you want to keep Ruth's memory going by getting the garden back in shape.
I can't really help on the gardening (definitely NOT my forte) but in addition to the above suggestions, I (more accurately said "she"!) has a tool called "Grandpa's Weeder". It's on a long, single wooden handle/shaft, so no problems to use it
Down at the business end there's a small 2-pronged "fork" affair with a moveable lever sticking out at 90 degrees to one side, just above the fork. To use it you just push down onto the handle then stand on the lever while pushing the handle over to one side. The lever "closes" the space between the 2 fork prongs and, IF you got the prongs in the right place to start with(!) the lower part of the lever and the 2 prongs grip the body of the weed firmly while you're pushing to one side on the handle. It lifts the offending weed straight out of the ground roughly vertically, roots and all. It's ideal for bigger weeds with deep roots such as dandelions.
It's a bit slow (you can only attack one big weed at a time, and it's not much good on smaller weeds), and it does tend to leave a fairly big hole in the ground where the weed was, so not ideal on a lawn for example, but it's physically easy to use and very effective at what it does.
My better half has been away for a while and I've been using it to clear a lot of the dandelions etc, which have sprung up in profusion with all the wet, stormy, and humid weather we've been having lately.
I bought ours in the local DIY Emporium so I guess you'll find it up there in "kilted land" too. Not much money either.
HTH