i have no idea what to do.
What is the exercise asking you to do? A link to the exercise would help.
Are you able to do the first step?
Open ~/.bash_profile in nano.
yea now im stuck on 84 percent
i need help with the export USER part.
It would help me to give you a better answer if I knew more about what you've done and what the terminal has responded with.
How about a screenshot of you editing the file in nano? Then another file showing what happens when you use the clear command?