New region and insertion of the "site login" form into it.

Hello.
I have attached 2 screenshots.
Could you please tell me how to add two regions at the very top of the site? In the screenshot, they are marked in green...
In the second screenshot, there is a login form for the site. How can I change this form from a column to a row? And then place it in the
region created on the top right. I would be very grateful for your answers.
I'm a beginner. Please explain in a not too professional way.)