Suggested Courses/Books AFTER Harvards CS50 course?

So i've finished CS50 (minus the final project a few months ago). I've been doing freeCodeCamp mainly here the past month and a half. I actually have a CS degree...but that was 8 years ago and I've gotten rusty (Only doing automation stuff as far as coding).

So I went through CS50 (Which was great!) to refresh on my fundamentals, and am interested in diving more into the web side of things. I feel like I "get" for the most part an intermediate level of javascript, but I think my fundamentals (Data structures/algorithms) could be expanded upon.

CS50 does a good job, but it's an intro class. It made me realize how NOT good of a job my college did with this stuff (But it could be i've just forgotten it all, since you don't use it a ton out in the real world). But I want to re-learn it.

I'd prefer it to be in C or C++, but Javascript is fine too (I like the lower level stuff for learning algorithms/data structures however). Edx courses or videos are great, books are also good!

Any suggestions?