I know pr obs 10000 Pol will say 'be ya self' and Hts Soho true but its hard to wen Ur under that kinda pressure, so i suggest that u have a general normal conversation and then step closer and lean in, dint go smashin ur heads together, just softly kiss her and dont go stickin ur tongue down her thoart, give urself time, tht kinda stuff comes later, kiss her with closed lips so both of u know that its just a little kiss and tht ur not goin to push her or urself into it.
Good Luck and I hope tht hlped!