If you know how to tank from other games, you just need to do slight adjustments to this game. Aggro for example. Learning is a process, whether you want to ease the groups you are in by reading or not is your choice, you are free to do whatever you want. You just can't expect people to be so understanding, especially for contents that are on the higher tier. Most dungeons for starters should be okay though since the mechanics aren't too complex yet.