I am 78 and have just bought an e-bike. The last time I cycled was at age 17years when I used to cycle to school.
The new bike is very easy to ride and the battery helps on hilly areas or just if you feel too tired to pedal.
However, I must say that I am sticking to back roads and parks etc. as my one venture onto the main road was very scary.
Very large cars swooped past me with only inches to spare. If I had wobbled, disaster would have struck.
Also all cars seem to cut in sharply infront of you after overtaking.
The health benefits will be very good, but, for me, no main road cycling.