4.1 Site title and tagline
Navigate to Appearance » Customizer » Site Identity and add your title and tagline.
Navigate to Appearance » Customizer » Logo and upload your logo image.
4.3 Header Image
Navigate to Appearance » Customizer » Header and upload your header image.
To create a menu we recommend creating at least a couple of pages with content first!
Navigate to the Appearance » Menu and create a menu. You can name it "Primary Menu".
In the Theme Locations check Primary Menu and save it.
Find more about setting up the menu here: WordPress Menu User Guide