How do I make out with a girl?

I had my first kiss Friday and since then we’ve kissed a few times, but we both really wanna make out with eachother although I’m curious as to wear to put my hands? She prefers to be against the wall and I wanna know how to do that in a comfortable manner where I can also put my hands on her waist? And how to keep the kiss slow and soft to keep us both into it as long as possible