Words that are links are underlined and in another color. To make your computer go to that link, you need to move the pointer on the screen by moving the mouse. When the mouse is over the link, it will change from an arrow to a pointing hand. When the hand is showing, click the left mouse button once. A new page will appear.
Buttons work the same way.
Move the pointer over the button. Sometime pictures are links. Move the pointer over the picture. If it changes to a hand, it's a link.