The Settings/General Menu

The main settings to fill in are shown in Red in the image below.

general settings WordPress Menu

The Site Title is what you want to name your website . . . It can be different than your www domain name.

The Tagline is a little spiel . . . a few words about what you are or do.

For images in the header containing words and unwanted taglines . . . delete the standard install entries . . . leave them blank.

WordPress Address & Site Address Urls . . . . your www.domain name.com

For beginners, I would untick the box “anyone can register“.
The very least . . . if ticked is have the New User Default Role setting left as “Subscriber” until you learn about User Roles