Tick anything you already have, in any order. Quests unlock once this is done.
A teacher catches what a video cannot, and most classes let you try one for free. If there is nothing near you, one series followed properly beats twenty sampled.
Find a tai chi class near you2 things left above. Quests are real things you go and do, so they only make sense once you have what you need.
First one waiting: Take a beginner tai chi class