How do I create a new page? How do I customize the slug/permalink?

To create a new Page, log in to your WordPress.
Find the Pages menu in the dashboard > click Add New option to begin writing a new Page.
Next, add the title of the page. Click the Add Title text to open the text box where you will add your title.

To customize the slug/permalink, click the gear icon on the upper right corner beside
the Publish button > navigate to Permalink and type in the slug.
If you are using the Classic Editor, the Permalink is located just below the Title field. Simply click the Edit button to customize it.