How should I start my Sweet Sixteen?

I am having my 16th b-day sometime soon. I will be having it at my house with dancing and loud music. Everything that comes with a party. One little thing, I don't know how to start it. To make the party "happening". lol I don't want it to be awkward at the beginning. People come in and there's music in the background. Should I put it low at first? And then casually make it louder? I will be serving drinks at first but I am uncertain on how to make it start. Please help!! Thanks so much!