How do I handle verb extensions without freezing up during an actual conversation?

I’ve memorized the grammar rules for verb extensions (like -rị, -ta, -la), but I’m a false beginner who knows the theory but panics when I try to speak. I have my first meeting with a native speaker next week. I’m thinking of using Chickytutor.com to simulate scenarios where I have to use these specific extensions in context, but I’m worried about relying on a bot. Any tips for making these complex verb structures feel like second nature instead of a math puzzle? I am asking specifically about learning Igbo, not a generic study routine.