Go into a shopping centre. Walk up to women shopping alone (assuming you are a man) and ask for their first name and phone number. When you get an incredulous look, explain that you are in self confidence training and would just like a phone number, any number, it does not have to be a real one. Perhaps they could make one up for you? Have your pen and paper handy. Walk on proudly if they tell you to piss off.
Do this a few dozen times and I assure you your self confidence will go off the Richter scale. Approaching a flying school operator will suddenly become easy peasy!
BTW, the odds are in your favour of getting the odd real name and number.