respect the telescopes
Every telescope at a star party is the pride and joy of the owner. Treat it carefully. If it’s your first time with a telescope, tell the owner that and ask exactly what you should do. You may have to refocus a telescope to suit your eyesight, so ask the owner to show you how to do that. That goes double for Dobsonian telescopes, which tend to be rather large and consequently the centre of attention at star parties. Since they’re manual they need repositioning every few minutes, so don’t be afraid to tell the owner that you can’t see the galaxy, nebula or planet at all. If you want to learn, don’t just ask them to reposition it, but ask if they can teach you.