More to the point, you need either a cofounder that you would entrust your life to or you need to have part of the requisite skillset so you can choose one that is competent and does not need to be too far out of your league. Because an incompetent cofounder will mess up exactly those things you can't handle, and one that's out of your league will either only have contempt for you or steal your idea and Zuck you.