Tanking is very new player friendly in this game. It is very easy to hold aggro.

Also, 99% of players will be happy to adapt to your tanking style. If you are new and want to take it slow just say so and it is highly unlikely you will get a complaint. If you are a big pulling style of tank then again, 99% of players will be happy. If you die or the healer cannot keep up then tone it down a bit, it's no big deal

The main this is to have fun