Hi! welcome to HubPages, first of all you have to write good quality articles that needs to be featured. You can write about anything that you know like a hobby for example or any subject that you know about. And if it gets featured by Hubpages, you will start to earn money if people are interested in your article they will start to follow you and it is up to you to decide whether you follow them too or not. The money here is not much to start off with but if you carry on writing and get your articles featured, your earnings will go up. Just keep writing. Good luck.