Hi @Eric_Rohr It looks like your site is hosted through a third party and we don't have access to your account. You will need to reach out to SiteGround for assistance. https://www.siteground.com/contact_us.htm
That said, you should be able to click on the background image to change it. At least, that's how you would do it through the Weebly editor. I don't know how much of the one you are using is like our standard editor, but SiteGround should definitely be able to help you out. Thanks!
