Go to WP Menu => Appearance => Customize => Click on Header => Site Identity
In site identity, you can add a logo and you can set logo width accordingly.
Go to WP Menu => Appearance => Customize => Click on Header => Site Identity
In site identity, you can see a check box of Display title and tagline enable It and now you can see your title & Tag line.
Go to WP Menu => Appearance => Customize => Click on Header => Site Identity
In site identity you can add site icon and add a site icon of (512px X 512px).
Also as you can see in given below image you can set logo width according to you.
Then click on Publish.
Go to WP Menu => Appearance => Customize => Click on Header => Header Type?
In Header Type you can see many types of header, Header will depend on your requirement
Click on Publish.
Go to WP Menu => Appearance => Customize => Click on Header => Sticky Header
In STICKY HEADER you can see the sticky header section now you have to check it on hide/show for Sticky Header.
Click on Publish.
