Dolphin is CMS for my project?

Hi guy! Any info, please, I wanted to create a site for consulting with professionals and users are asking their advice by subscribing to the portal and leaving comments.
this example  www.liveexpert.ru

Yes, Dolphin can be used for such a project and has been done so by others.  There are probably things that others can answer better than I can since I mainly use Dolphin as a regular social network.  What needs to be understood is that you may need to purchase modules from the market to accomplish some things.  First step is to sit down and outline what you need the site to do.