I'm sure you'll be back to health in no time.I've just fitted my new indicators (very smart, though the seller now has no more to sell). Took about 10 minutes to fit with zero effort, other than working out how to lift the old indicator out and slot the new one in. The box came with a tool to prize the cover off (not needed) and a Torx screwdriver (though I have one).
Incidentally, I sympathise with Alan because I'm just about to have a (very) large chunk taken out of my left arm: skin cancer. Not looking forward to that, but the perils of living in Australia… and I won't be driving for a while.
As you say in your next post - staying positive is a good thing.
Wishing you and anyone else with health problems of any kind, all the best.