Not that different to us, remember we were all once your age and in your situation, too.
All I can say is to concentrate on having fun and enjoy each other's company. Don't sweat the physical stuff right away. Even in adult relationships, we don't jump into all that on the first date. Hell, I don't think I kissed my bf until our fourth date!
I would say a hug good bye is appropriate for now (first date). The problem when you're a teenager, is you always sweat about 'what' you're 'supposed' to do. You're just supposed to have a good time, and relax. Don't expect to kiss her for awhile.
Live as if you were to die tomorrow. Learn as if you were to live forever. - Mohandas Gandhi