How can you be found more easily on twitch?

I deal with a lot of topics as well as games i'm currently registered under skyrim on twitch but don't know how to reach all groups because you can only set one game

and topics such as podcast or internet radio are automatically deleted in the settings when I try to set it

By having people watch your stream. Ask friends and acquaintances if they turn on, they don't even have to watch actively but just stay in the stream. People with a lot of viewers are always higher up the list. If you have 0 or 1 viewers, nobody cares about you and nobody will watch your stream