Setting Up Our Website But Not On A Local Server

Hi All

We are looking to get this software to build a website however I do not want to download and use the local hosting on my laptop to do this, as it's windows and old! Is there anyway I can get the software and edit my site similar to Arcadier /Wordpress or do I have to download the software.

It seems too technical for a newbie like myself, maybe I should stick to a WYSIWYG type approach

Any help would be great