Hi, although I’ve never actually done a coach tour before, I’ve travelled on my own before all over the world so I may be able to help.
You really won’t have to worry. Travellers and backpackers are just meant to talk to each other, and anyone who doesn’t want to talk to you isn’t actually worth talking to anyway. So basically you’ll naturally find the right people to hang out with on your tour.
I think that so long as you can manage to turn up the right time and right place for your tour you’ll have no problems with anything. This is my advice to most people with most of the questions on this forum - turning up to sit on a coach really isn’t that difficult - this is not a personal slight by any means, but some of the questions here really do make me guffaw.
So basically my advice is relax and just look forward to your holiday. The little things will sort themselves out, and the big things probably won’t even happen.