Set your computer level higher.
Openings? That’s a deep well!
Here’s a free pdf of a standard chess openings book...
https://archive.org/details/fundamentalchessopenings
Chess Openings Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond
So, it has been a week or so since I started playing chess and I am winning against Computer from level 1 to 5. The opening that I have been using is the basic e4 then d4 and then the knights. I'm not sure if this one has a name or anything but it has been an effective one for me. However, I was thinking about learning other openings so that I can have a lot of options to choose from. Can anyone share any openings?