Get a $70 template from WooThemes (or any of numerous cheaper options) to make it look professional, then find a stock image of e.g. a woman sipping coffee at Starbucks and do one of those hand-drawn arrow things saying "She'll be a published author by the end of the latte."
Alternatively, a youngish mother playing with her child. Again, hand-drawn callout: "My mom is a published author."
Alternatively, a youngish mother playing with her child. Again, hand-drawn callout: "My mom is a published author."