I'm sooo sorry to hear you are still having problems walking.* :(* How sad for you.* I have a similar situation with neglecting my garden.* My back has been giving me fits and some days I can barely get out of bed, so my hubby mowed down most of the weeds and now, after a rain with the soil more easily worked, I'm pulling some weeds that are in the beds.* It's a mess too, so I understand how overwhelming it can be.
I'd say to mow what you can so the weeds don't reseed and pull what can't be mowed.* Does it sound like a plan?
Please get better soon.
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.