You can use the left mouse button to "highlight" or "select" links, words, sentences, articles, and the right mouse button to do the cut/copy/paste etc like Arthur says.

Highlighting/selecting-

[Move the mouse/cursor pointer to the start of what you want to move/cut-n-paste (the internet address, information, links, whatever)
Push the left mouse button down and move the mouse/cursor/pointer across the whatever-it is-you-want-to-move. The lines/words/paragraphs/internet address/whatever you are covering will change color as you move across it/them.
When you get to the end of what you want to move/copy, let your finger off of the mouse button. ]

Another way to do copy/paste -
highlight or select the text you want as above

Then hold down the Ctrl button and push the c letter key- that will do the Copy action

then wherever you want to Paste the link, text ,etc

just hold down the Ctrl button again and push the v letter key - that does the paste action

so you can use the Edit tool , the mouse buttons, or the Ctrl/c/v keys

Does that help you to understand that part of it?