Ask.com is a great place to ask questions you need answers too and answer other users questions that you are knowledgeable on. If you find a user who you think posts interesting content, you can go to their profile and click the Follow button, they will then show up under you Connections.
All you do is answer questions, ask questions, and follow different people and follow your friends! It is a very fun site where you can release your knowledge on different subjects. You could find people who share the same interests with you, and you could interact with them, and follow them. :)