The best way to build trust is by being transparent and straightforward. Your description of the website matter on multiple levels: on the one hand, it is a quick way of connection between the content and the real personal behind the scenes, on the other hand, you let people get a clue about who you are through a piece of your story.
Julia offers you room to display a relevant text and image by using a widget which is simple to handle it. Before letting you know where you can easily find, please take a look at the screenshot to see the result.
Now, all you have to do is to go to Appearance → Widgets → click on Text (screenshot), and add a short bio and a picture. For inserting the pic without struggles you need to use an HTML tag: . On top of that, if you wan to choose a particular place to display the widget on your website, please enable the JetPack Visibility.