In the Google Play Store, or the Apple App Store, find and download the Metamask Application, this is a wallet with the capabilities to connect to OpenSea.
Once the App has downloaded, open the Metamask App and follow the Instructions to set up a Metamask account if you do not already have one.
For prospective Beholders of Wise-Dome Premium NFT Collectables, after you have completed the former step, you may choose to skip the next steps as you do not require the addition of the Polygon Matic (MATIC) Network to your Metamask Account. Instead, skip forward to the bottom of the page to proceed to the next part of The Adventure ... Enjoy!
When you have set up your Metamask account, click on the Hamburger bar on the top left of the application and open the 'Settings' page.
Open the 'Networks' page and click the 'Add Network' button (this will help add the Polygon (Matic) Network as the Wise-Dome Deluxe NFT Collection is found exclusively on the Polygon (Matic) Network).
Fill in the Boxed details as shown in the image below, then click the 'Add' button.