Driving a car is very complex, there are so many more other drivers out there, and some of the road junctions, etc, can be confusing. Cars are also changing - it’s taken me, for example, a long time to get used to the handbrake on my newish car being a VERY small toggle, rather than the large usual handbrake lever that I could use so easily after 40 years of driving.
If I have a passenger, and it’s not every day, I politely say ‘I must concentrate now’, if reversing or parking and no-one has ever minded.
I’ve certainly not had anyone re-tuning the car radio without asking, that would be very cheeky in my view!
Keep driving while you feel able, don’t give lifts unless you want to. And perhaps say to others who want a lift, if YOU want to give them a lift, that you will need to concentrate in order for everyone to get to the destination (and back again) in one piece! ? ?