DSA for Java tips

So I just got a private message about my thoughts on the Princeton algorithm and if I have DSA course knowledge.

https://algs4.cs.princeton.edu/home/

My flaw is I do not have DSA course knowledge because I had Security Clearance and was managing legacy Java EE systems for the military.

Now that I don’t have my clearance I need to learn DSA. Any tips for learning DSA in Java that are not overburdening like the Princeton link I provided?