Hello Theresa
I am 54 and due to go my 9th JY tour in May, you will be fine honest....it actually works very well, there are many postings on here about it all, but just a few things for you.
Pick a holiday that you really fancy going on, that might be near or far, my first one was USA.
People do mix in really well, and you can have such a laugh amongst the tour.
I have never eaten on my one, depending on what sort of tour you pick there is always someone you can sit with.
Ladies out number the men.
I think the age range is coming down a little bit from when I started in 2006.
Main age 55-70 but with younger and older either side.
Age is a number some are young 70 year old and I have met 30 year olds who are old!!!
I might be 54 but I have been out walked by 70 year olds...
This is a very safe way to travel you are head counted so will not get lost.
I have travelled from Austria to New Zealand, so if there is anything I can help you with just ask.
Happy travelling
Cindy