Struggling with subject-verb concord: where do I even start with these noun classes?

I’ve been studying Xhosa grammar for a few months, and while I’ve memorized a few noun classes, applying the concord correctly in a full sentence is killing me. If I'm using a Class 2 noun, I feel like I'm constantly second-guessing which prefix to use for the verb agreement. Does anyone have a mental model for drilling these agreements that actually transfers to speech instead of just doing fill-in-the-blank grammar exercises?