If you have really never had sex with someone you don't know, then you really should consider taking advice. All the positives are suggestions so there are loads. But the advice I offer is to start with an hour. Spending 2 hours with someone you may not get on with can seem like a very long time. Experienced punters may get better at picking ones that they will get on with. And better at managing the time. I don't think a first time punter should start on the autobahn. Why not start with one hour with one of the tontober stars? Then if it doesn't go well you have £150 to try again.