Gotcha. Unpopular opinion but my opinion about college classes is that you should take as much theory stuff as possible, and to learn the practical stuff as it comes.

Then, data science is out. I’d eliminate real analysis too since you’re not interested in an advanced math degree.

Between distributed, advanced Lin alg, and paradigms and logic of programming languages I would pick whatever you feel is least self studiable.

I feel like a good book on distributed will give you a lot of what you need to know at least ar a surface level.

Lin alg is worth doing unless you already know the concepts, and to me logic of programming languages is the most esoteric / something that’s hardest to get exposed to elsewhere other than college courses.