hello and welcome. I'm amazed you already found #steemstem on your own.
However, I still have something for you: a very complete guide to the processes in and around steemit that I can really recommend to any newbie:
https://steemit.com/steemiteducation/@theferalone/field-guid-to-steemit-how-it-works-and-how-to-survive-your-first-30-days