Marjorie
Please don't panic.....put the blue JY labels on your hand and case luggage so that's one thing that shows you are a JY traveller, and look out for other people's labels, and then just say Hi I am on the Andalusia tour etc.. To break the ice.... Or You might be sitting with a fellow traveller if so make contact then, if not sit back and relax, till you land and group up..
Also there should be a JY rep at the booking in desk to see you through that part of things, if the tour manager is flying out with you they might track you down if not you will meet them at arrivals at the other end...
Don't worry people mix in together really quickly, just remember it takes two to have a conversation, so don't be frightened to say hello to people, some one has to start ...
I hope you have a great time away, I have not been on this tour but I have been on 9 in total,
Cindy