I have had the same problem with that. All you have to do is stream and promote. Also if you play games like CSGO or Rocket league, make your name your twitch link. That is an interesting way of promoting but that is a way i used and it got me 2 followers.
Start by thinking of what content you want to offer the viewer, is there a reason why they would comeback to see you? Try to make an interesting title, depends on what game you choose if there is a way you can play with the viewer or help somehow, that is a good way to approach them and engage. Be chill, friendly, promote your twitch on forums, specially if there is a forum specific to that game then use it in your favor and just be yourself.