How to do Keyboard Shortcuts

I worked in a job called "data entry". As much as possible I want to finish my work as fast as I can to earn extra credits from my employers and for me to finish my work on time as well.
My job is basically to do copy paste of information.
How do I do shortcut by using keyboard?
I think it is more convenient for me to finish my work on time.
What are the other shortcuts that I can apply related to my work?
