oh, the trouble I was having was extracting files out of the RAR, sorry I should've explained that better. how do I open RAR files?
Do you have WinRar installed on your computer?
If not then that's your isssue.
where do I download it
You could save yourself a lot of time by asking Google this exact same question.
https://www.win-rar.com/start.html?&L=16