You are new, so no matter what your experience beforehand everyone will assume you are utterly crap at telling jokes to people. This can be frustrating when you are trying to assure everyone you are the UK's answer to Sarah Silverman with a bit of Lee Evans thrown in *cough*. The answer? Well, my answer, is to embrace it.
Immediately I began to draw a fair amount of attention, I could see people sniggering, actually sniggering at me. I tried to act normal whilst flexing biceps and breathing in. People looked up from books and stared, a group of young girls looked at me then hid their mouths behind conspiring palms... "What the hell is wrong with these people? ... What's so damn funny?"