Don't worry. If you take each step one at a time you will have no trouble completing the task.
You will have two or three windows open on the computer. In one (this one) you will see questions, instructions and links to click.
In the other will be the answer sheet. Your teacher will tell you whether to print the sheet or type in answers on the computer.
The third window will have the websites you will visit. Close the third window after each session.
If you don't know how, ask your teacher to show you how to switch from one open window to another.
You may need to use the Back button to return to this website from time to time.