I started on StreamLabs their good too! Happy streamingI prefer StreamLabs OBS over regular OBS. Bonus is if you already use OBS it will import almost all of your settings and scenes. This is a good basic overview on how to get started but there are quite a few settings within OBS that can be tweaked depending on stream quality and what you're trying to do.
I just started streaming recently and it's a lot of fun, even without many followers. I use the same name on Twitch as I do on here if anyone wants to take a look at the intro video and stream overlays that I've made for my channel.