Welcome to you
There are many threads on here about 1st timers and the age questions etc, so have a good look through, there are a couple of video links I am one of these under the name of NIXON there is another under the name of lovelylesley. that might help you.
I have done 8 tours near and far this year I did Hong Kong and New Zealand Tour. Was amazing. I tend to pick tours with lots to see and do, not a great lover of being on a lounger.
I have always had a great laugh and I have met some fantastic people along the way. So don't waste anymore time, look at what is on offer and GO FOR IT!!
Cindy