You just... start it. Be smart about it though, some teams are just sort of slapped together in a random fashion, be patient and hopefully youll thrive. Best of luck.
Edit: and please dont make this team in hopes of having gold chrome as your "team paint" as one of your main aspirations, for the most part team paints are silly and cheesy, especially without a livery editor. They just look like a bunch of lemmings lol.