To add a new page to your WordPress website, login to your WordPress dashboard and follow these steps:

• From the left hand side pane select Pages.
• Click on Add New.
• Now, you can see a page titled Add New Page.
• Here, enter the title and text of the new page in the appropriate boxes.
• To add media files (Images and Videos) to the new page, click on the Add Media button.
• Click on Select a media file.
• Click on Insert into page.
• Click on Preview button located on right side top to see a preview of the page.
• Click Publish and a new page is created on your website.

(During this process, keep clicking on Save Draft button at regular intervals to save your work)