transcribing etiquette

I'm new to transcribing for history hub.  I've been searching in vain for a guide on transcription etiquette.  While transcribing for another organization I received an assignment of 10 pages.  I transcribed the content.  It was all mine to complete.   History Hub seems to be a free-for-all where anyone can add to or edit at will.  If so, that's ok with me. I'm just worried that if I start in the middle of a document that I'm stepping on someone else's toes or violating some aspect of community etiquette.

I hope that there is a guide already compiled on sharing and editing work.  If so will someone send me the link?