It's a really simple language, not designed to do complex coding, but very useful if you're looking into either creating, modding, or simply fooling around with a TGE game.
So... you wanna learn TS
This site is designed to help you code in TS (although, many other coding languages are similar to it). Even if you're comfortable with TS, this site should be able to give you some help and refreshers on just about all there is to the language of TS.
Here's a quick Table of Contents as to what this site provides for you: