Osiris, there are a lot of tutorials around learning OBS. One of the best ones that I've come across is EposVox's OBS Studo Master Class 2018. It helps you figure out what you want to learn and covers a large swath of the various OBS functionalities.
EposVox's OBS Studio Master Class 2018 YouTube Playlist: https://www.youtube.com/playlist?list=PLzo7l8HTJNK-IKzM_zDic...