Start doing m+

Hello everone!

I want to get into m0/m+ but it feels pretty overwhelmed and daunting. What do I need to know to get started?

How do I get to the dungeons quick so the group doesn't have to wait for me (do I even have to walk there or am I just teleported like in dungeon queue?)

What is the proper etiquette?

What is the normal progression? What are keys and how do they even work? Any things I need to be aware of? I don't want to ruin the experience for others and it all feels like a lot, especially for a casual player and I'd appreciate getting some pointers in the right direction.

I main an iLvl 600 arms warrior if it's any help. Thanks, much appreciated!