Home Page & About Me – Update Graphics/Info

Hello,

I am not able to update the graphics on my homepage. How can I update those graphics?

Also, the contact information on the About Page on the footer section I cannot update, and the Highend Logo still appears on the footer section on the About page (I cannot update that either). Where can I access that information so I can update it?

I included pictures to show you what I see and where I am trying to edit that information.