Take your time and enjoy the process; World of Warcraft isn't just about the destination.
There's a lot to be mindful of as you jump into playing in WoW, but not all of it has to be tackled right away. Take your time and enjoy the process; World of Warcraft isn't just about the destination. It's a hobby that, if you really enjoy it, you may well end up returning to for hundreds of hours over the course of years. Don't rush.