"Submit Listing" button

How do I get the “Submit Listing” button (with button image, not just the regular link) to appear on child theme blue cosmos, the same way it does on the parent theme? I would like the button to show up on the top right hand side. I would however happily do without the search field that appears to the left of the button on the parent theme.

Where can I make these adjustments in the child theme, and how? (I am not good with code, so specific instructions on where and what to edit/add would be much appreciated)