Hello Phil and welcome to you...
I have done 8 JY holidays there are a couple of vieo links on here from Lovely Lesley and Nixon which explains a bit more about these holidays ( I am Nixon)
I have travelled long haul and short haul,
They are great fun and a very safe way to travel.
Main age range 55-75 with younger and older either side.
Always seems to be more ladies than Men
If there is a particular holiday you fancy then book it you will have a great time I am sure.
The first tour I did uas a USA tour had a great time and never looked back.
If there is anything else I can help you with just ask.
Cindy