Text aligned left, image centered

Hello guys,
probably this is a very easy matter but I can't seem to fix it.

As you see in my account

www.cargocollective.com/ajprandi

in the "About me" section, i have both a text and an image.
I would like the text to be aligned LEFT as it is, but i want the image to be CENTERED on top of the page.

This is my first time on CSS and HTML, i've tried a couple of things like adding "text-align: center" to

.project_content img {
float: none !important;
margin: 0 0 40px 0;
}

but can't seem to work it out.

Thanks for your time