Before you can actually broadcast your gameplay to twitch you will need to sign up for a twitch.tv/activate account and learn a little bit about the platform. You can sign up for your account on the www.twitch.tv/activate homepage or https //www.twitch.tv/activate by clicking sign up in the top right corner, you will need to create a username and password, or link up your facebook account for a faster process. This username is the name people will know you by on Twitch activate, you can change it later, but I would try to start out with something you like and is easily recognizable.
