Hi Jaslex.  I'm single, shy and not self-assured in any way. 
I went on my first JY tour of Puglia last year and it was lovely! 
Age range 30s to 80s - it was very relaxed.  I didn't feel 
self-conscious at all.  I'm not normally a 'chatty' person but I 
found myself chatting away to anyone I was near! 
You find such a lot in common when you are touring with like-minded people. 
I'm booked on my next JY trip in May and I can't wait.