i only started smoking in jan. and i've had to lay off now in the summer, but honestly, my first time i barely felt anything even though my eyes were red as fuck. *shrugs* it wasn't until my second time that i actually got high. i definitely coughed up a lung that first time, lol. just be yourself, it's up to you whether you tell them that you're new or not. if you really don't want to tell them that you've never done it, you could just probably say that you haven't smoked in months (for w/e reason) and they'd excuse you for coughing like a noob. i hope things work out for you regardless!