A lot of people have no idea what tat actually is or how to do it. It's just pretty knotting where you can make things like doll dresses or baby bonnets.
You can tat three ways - hand tat, shuttle tat or needle tat. As I've seen it, if any one person can tat one way, it's hard for them to do the other ways. It's not impossible, just difficult. I, myself, learned shuttle tat and that's my preference. I tried hand tat and just could not understand but something about having the shuttle there as an aide helped me out a lot.
Because tat is not a well practiced craft, it can be hardtop find shuttles to tat with. This can lead you to try needle tat, which you do with a needle or hand tat which you do by hand knotting but I really enjoy shuttle tat. In my opinion, it is the easiest.