Even the first step of the installation does not work.

The Imgur token does not work; the link provided only takes you to the Imgur homepage. The installation is too complicated, and Unity is full of bugs. Therefore, I request a refund.

Hello,

I would love to help your errors get fixed. It looks like to me that you more then likely have an error with your install. Please try to reinstall unity again, I am unable to assist with any unity errors. 

As for imgur, you are to put in your API token please re read the instructions and try again.