Hi Lara! If you've read the main site about 3 or 4 times (a must!) and are just looking for more "tips" than safety things etc... I would say avoid talking about inflammatory (sp?) topics like politics if possible. I always ask things I would on a date - "what have you been up to today?" "Oh I don't know much about that as a career, what's your favourite thing about it?" but your client could very well not want to chat at all. If it seems they don't want to chat and want to get down to it but are shy, I try to initiate a little physical contact like putting my hand on his knee while we chat.
I'm a student so I tell them that, and tell them I do a similar but different degree to what I actually do. I'm honest about my hobbies without naming any organisations/teams etc that I'm part of.
There are some really interesting things on the forum, like what are good things to have in your handbag ect, so it's worth having a browse at Q&A and Blather & Babble. The search function is great. The warnings & wasters section is really good to look at often for your safety and sanity! I think the main thing is that it's of course okay to be nervous but try to seem in control, and remember that really you ARE in control and stick to your guns if you're not happy about something.
On one of my very first bookings, I was having a nice chat with the guy and was relating something a friend had said to me, and while quoting my friend I used my real name, just a slip of the tongue. I think we need to even keep the automatic parts of our brain in check! Stuff like that takes a while which is why I tried to avoid certain topics, until I knew I really thought of myself as my work name.
Good luck tonight
Stay safe and have fun!