How to move an image block to the middle

Site URL: https://www.irmadewind.com/morework

Hi,

So I just build my website and I am struggling to move an image to the middle. It's a "manage projects" block and apparently you can't just move images, according to the Squarespace people on the chat. They told me to go to this forum and maybe someone could give me some code that I can enter to move this image. So the block/image I am talking about is on this page: www.irmadewind.com/morework . If you scroll down you can see an image with a rose and it's aligned to the left, and I would like to have this in the middle. The template I am using is Utica. 

If someone can help me that would be greatly appreciated!!