Redirecting

Hello,
I’m creating from scratch my website in WordPress (which I already installed).

In the meantime, since I’m giving away a lot of business cards, I would prefer avoiding people to see the website under maintenance, for that reason I created from my CPanel a redirect to the website of an associated company.

Unfortunately when I got back to my wp-admin panel I realize that I cannot edit and save my website avoiding that to automatically remove the redirect. My hosting’s costumer service suggested me to ask for a solution to WP.

Is that right?

Is there a Plug-in which allows me to edit my website while redirecting it to another one?