Also did OMSCS. Highly recommend it. The problem with self-learning is that sometimes you convince yourself that you understand something when you really don't.

Only when you get smacked by an exam or an assignment you realize that you've been fooling yourself.

The ML and Systems track is pretty hardcore. If you survive those you have pretty good foundational knowledge.

Fair warning though - the program is not a joke. Georgia Tech always leans towards application. You will spend a lot of time writing code and tinkering, but it's worth it if you want to learn a ton.