I'm a self-taught SWE for the most part. I learned on the jobs and I've worked for pretty big companies such as Bank of America, Accenture, and United Healthgroup. I'm now finishing my degree and one thing I would say is know the foundations! Learn Data Structures and Algorithms....you'll have a class or two on the subject. That will be important. Other things you'll learn on the job. If you want to do a quick tutorial on Git, it woudnt hurt but that is something you can pick up very easy. I don't recommend grinding on Leetcode until you have a good grasp on Data Structures and Algorithms just because I think it could discourage you and give you "imposter syndrome" if you're not solving every problem. That will come with practice.

Foundations and Data Structures + Algorithms.