I'm interested in doing some posting and stuff, and I have a few concerns with the terminology some people are using, is there a post somewhere that I can read or refer to?

Most commonly used terms are explained here: https://forums.d2jsp.org/info.php?p=53

I would recommend to check out the new user guide as well: https://forums.d2jsp.org/topic.php?t=63392948&f=34

Have fun trading!

Thank you so much! I'm not sure why I couldn't find it, got my answers in there! And I will check out the new user guide now.