new to charge sooo scared!!

Okay so a few weeks ago I wrote in saying that I wanted to go to transfer from my post surgical floor to CCU. It didn't happen and now I'm fine with that. But somehow or another I got talked into being orenatied to charge. Ahhh!! I was told this will be a good challenge for me and it will cause growth!! I am only one year out of school so that is my experience is just this floor. I am sooo scared!! I will then be responsible for our 18pt floor. I think what makes me more nervous is delegating. They just don't teach you enough on how to do that. I don't want people to walk all over me and I don't want to sound like a drill sarget either. I know for the most part people know what there job is and they do it, but still. I don't know maybe I am looking at it from the wrong prospective. So tonite will be my first nite and me and the assistant nurse manager will be ONE. I think Im also scared because there are other nurses that I work with that have more experience than I do or are older than I am. I think they don't want to do it. I guess I am worried that others are going to look at me and be like "she shouldn't be doing that, or who do she think she is?" I know i shouldn't worry about what people think. I mean we have a great floor and great nurses, but its hard not to think somebodys going to be talking. and yes i know people are going to talk about you no matter what. but anyways these are just things i am thinking about. Just wondering if anyone has an opinion about it or has gone thru the same thing. Thx