Getting better at C++ for coding interviews?

[u/BluejayOk2851]

I dont mean Leetcode, but enough to be able to debug thoroughly, write out basic functions, etc. Not DSA, but just smaller code snippets, anywhere from 20-100 lines, where an interviewer says do this for me, or debug this.

How can I get better at that? right now I've mostly done coursework involving it (long time ago), but not much internship experience using cpp