Until lvl 60 i think. Until that it's unlimted playtime . And once you hit 60 you can freely explore all content unlocked ip to that lvl which is 2 expansions and you wont run out of stuff to do
If you want to try focus on one class until you get atleast flying mount. Im on eu light twintania server but newcomers or free cant use tells but usually they get invited into a novice channel filled with ppl to help. It's the friendliest community ive met
If you choose to start on same server let me know your name
It's a massive game
I recommend seeing these two short videos
https://youtu.be/3xw4GI12ToU
https://youtu.be/Huwr6VKMcXI
Helps you decide which class to start and cover some basics
Note you cannot skip reading about quests and just take them. You need to read all to help you self but it has alot of stuff to make it not boring. Well to me atleast