How do you kiss for the 1st time?

I just started dating this guy, who I know has gone all the way with his ex. He's uber sweet and doesn't pressure me to do stuff like that but he does really want to kiss me. That wouldn't be a problem, but I haven't had my first kiss yet. I can't tell him that cause it'd be wayyy too embaressing. I'm freaking out. He gets back from being suspended tomorrow and is in all of my classes. What do I do? I have no idea how to kiss and I really don't want to make myself look stupid or like a bad kisser. How do you even. Help? Thanks.