FIIRST Kisss please read i need help?

My bboyfriend told me this weekend were gonna make out. He thinks ive kissed before, which I havent, what should I do,where should I put my tongue, do I tilt my head opposite of his, when he stops do I just pull away, right whn he looks at my lips should I open my mouth a tiny bit n move forward, how should I sit to feel comfortable. No please don't say just go with it. I need answer or im gonna b a Reck! I'm already scared! I'm 15 fyi and he's perfect n this is my first kiss and I want it to beyond perfect