Position of widget in header

Hello!
I was able to add the code provided in the documentation to child theme functions.php, and create a header widget. It’s defaulting to the upper left of the header area. I have a Center Logo, Menu Below, header, custom size (173px height). I want the widget to be placed on the right side of the open space in the header. When I implement the CSS to place the widget it breaks the styling and creates a hamburger menu. (a login graphic with link to another site), and offsets the primary logo. Is there a different solution? Back up would be a secondary menu in the small bar at the top, but I’d want that to be a button, not just text.