Also check out How to not screw up your gear, the Guide as it has a lot of useful info and some nice charts for gear recommendations.
Also ask around on the Official Discord as there are a lot more people that frequent that then the forums these days. So you might get a bit more feedback. Joining a cabal in game is also a very useful way to get advice, find groups, and get experience with tanking with players that are patient while learning new fights.