Build a Website

I have created a sample website on wix, unfortunately wix does not provide features such as member login/profile page and social network features. I am looking for a freelancer who can integrate the following features in my website. [login to view URL] 1. Create member login option. 2. Members should be able to connect with each other, like and share each other's posts. 3. Create an ask and answer forum where members will ask question and people logged in as experts will answer the questions. 4. CMS for admin to post content and keep a track of user activity.