Welcome Graham
If this is the highlights of Tuscany tour then I went in this a few years ago, lots to see and do with out being to hectic, if it is this tour I am sure I left a review about it so have a look on the review boards, if there is anything else you need to know just ask.
I can understand you feeling nervous we all do, but once you meet up at the airport and start your holiday it will be fine. I started to travel with JY in Sept 2006 and I have my 10th tour booked. great holidays and people to meet very safe way to travel, laughs along the way, fantastic sights to see, all ages mix in well with one another usually there are more ladies than men do not let worry you. If you would like to know how many are booked or make female ratio ages etc, you can post on the editors board and Julia might be able to answer you, or give the office a call.
I am sure you will be fine so give it a go..Good Luck
Cindy