Streaming is quite tiring, so be prepared. A decent facecam and mic is good Do some tech tests to balance the sound (I usually like to have music playing in my streams, and it can be quite hard to balance. Not 100% necessary but sign up to a thing like stream elements or similar. A second monitor with your twitch dashboard is Handy, theres also twitch bootcamp which has some nice information. Your first streams are usually always mild, but just focus on getting the hours in, even if your just sitting alone with one viewer. Playing smaller games is a great way to get some new viewers as there's less competition

Bit short on time but there's some basics there