Some people make an outline of their plot to keep from gettting lost.
you don't need to state the plot. just let it dribble along with the dialogue and action- let the reader be watching, eager to try and figure out where you are going next.
characters can be introduced a bit at a time, or all at once, like in a party.
Let your writing flow, and you probably will sound like you, not like others. Also, you can change how it sounds in the rewrite- just get it on paper to start with.