Granny23
Due to health issues I am no longer able to drive and I struggle to use buses, but I have found the perfect solution.... I have a younger friend who is early retired through ill health, lives nearby and cannot afford to run a car on his small pension. So now he is the "keeper" of my car while I remain the owner and pay for the tax, Insurance, MOT, repairs, etc. and we share fuel costs. He drives me to town for shopping, medical appointments, etc. and he also uses the car for his own purposes including visiting his elderly parents who live some distance away. This version of Car Sharing suits us both and I would recommend it to anyone with similar circumstances.
That's a great idea Granny23 
Stevie D - I'll just throw in a few things to think about. I gave up having a car for financial reasons when I was in my fifties. I could actually walk to shops (but usually had to get a taxi home as I couldn't carry all the shopping bags that far). It took a lot of adjusting - allowing more time to get places and it was frustrating sometimes when it took so long to get somewhere. I'd need a bus and then a taxi, if I wanted to travel by train.
Taxis were never available before about 10am (eg if you had an appointment) because they were all doing school runs - likewise the same between about 2.45pm and 5.30pm - school runs. Local authorities use the taxis for some school transport.
But that might depend on the area.
The point I'm coming to is, I later regretted not driving for so long when I then couldn't walk or use buses - but could drive an automatic car! It took me some time to get my confidence back driving as I hadn't driven so long.
But a car is now my lifeline - because I can't manage buses and can't walk much.
So although at the moment, you can use buses and taxis - there may come a time when a car is more of a friend to you and can carry things for you and enable you to get out.
So I would think carefully about giving up driving altogether.
If you keep it and don't use it very often, a car can last a very long time, due to low mileage and not getting worn out etc. And it's expensive to replace it.
I now use the car to transport my folding mobility scooter - although I usually need someone with me to get the scooter out of the boot - it enables me to get out and do the odd thing.