Generally it takes a long time to gain a base of followers, so you're going to have to be in for the long haul. I have a few recommendations on what you could do.
-Be very smart, informative, and put out high quality streams
-Be funny
-Fill some sort of niche E.G. "one trick urgot mid to plat"
-Just be yourself, you will attract a following in time
general advice
-follow a schedule, E.G. live stream every tuesday at 6pm
-keep followers update via social media
-be patient, it takes months and years to build up a large following organically
-be high quality, there are plenty of shitty streamers who put out bad content, having high quality content means you will do better. this means good audio, good video quality, good stream layout, etc.
That's all i can think of right now.