@tikaram
Thank you for your help.
I’ve moved the search box to the sidebar.
I edited the image to a width of 1920 within the media edit option.
A couple more questions:
I would like to have my website name and tagline in the header. Do you recommend I add those to the image in a graphics program? Or, can I change the header background color and still use Site Identity options.
Thank you again for your help.