Enlarge logo and change hero image in Pillar

I’m working on some updates to a site located here:


It uses the Pillar theme.

  1. How would I move the logo (currently in the center of the menu) to the upper left and enlarge it by about 50%.
  2. How do I get rid of the purplish bar below the hero image
  3. How do I change the hero image? I can only seem to find where to change the text.

Thank you so much for any help!