I'm doing a JavaScript course, i got to know typescript and i definetely see it as a way better alternative and way of writing cleaner code in the usually messed up js.

Anyway it's not quite clear to me what i should do now, because i understand javascript to a decent level, but i woul love to use typescript in the future for my projects..

It's knowing javascript in depth better or should i opt into a new course that teaches typescript in depth, if so, do you have any resources (free, paid courses, free docs like MDN or javascript.info) to suggest me?

I'm following the "complete javascript course" from jonas schemdtman, that i got suggested from coding communities, on udemy, which is an 80 hours course that looks quite complete to me, it teaches about the js engine, its compilation style and its runtime too, not just the code, is there anything similar? My goal would be opting into typescript and really digging into it, really learning how it works on code level and behind the scenes.