Many new Mac users seldom use keyboard shortcuts. Even frequent actions such as cut and paste are laboriously handled from the menu bar. If you are light on shortcuts you are missing out.
While it can be daunting to see a long list of possible key codes for almost every action you could desire, it’s easy if you limit your trawl initially to, say, the top ten operations. You can learn them in minutes and and this informative article from Cult of Mac will set you up and increase your productivity no end.