Struggling with subject-verb concord agreement in Zulu noun classes

I’m getting tripped up by the sheer number of noun classes. I understand the basic rules, but whenever I try to construct a sentence using classes 7/8 (isi-/izi-), I end up forgetting the correct prefix for the adjective or the object marker. Is there a mnemonic or a specific way to drill these so they become intuitive instead of me mentally reciting the table every time? I’m looking for a way to make this rule-set transfer into actual spontaneous speech.