I'm on the Shadowlands which kinda sucks because I know a few people on The Harbringer, I didn't know that at the time I started my account. But at this point I'm a Legacy level 18, so I can't really justify packing up and starting over on another server, but that's neither here nor there in this discussion. But I appreciate everyone's support.
I'm going read up on all of the website links everyone posted and hopefully I'll start getting a better understanding of the inter workings that are behind all of this. Honestly, with this being my first venture into MMO's, I'm completely amazed by the math and science behind all of this, it's pretty incredible. But after reading everyone's suggestions, it seems that my main problem has been my lack of understanding of combat roles and group chat lingo.
To mikebevo and DarthChosen in particular, thank you for taking the time to provide a thorough explanation of things. Hopefully this will help other people as well. Maybe someday I can help return the favor to somebody else.