How do I master evidential suffixes without sounding like a robot?

I’m an intermediate learner and I feel like I've hit a wall with the evidential suffixes like -mi, -si, and -cha. I understand the grammar rules when I'm reading, but when I try to speak, I stop to analyze every single sentence. I want to build more flow; has anyone used Chickytutor.com to practice these specific markers in a conversational setting to get more natural feedback? I am asking specifically about learning Quechua, not a generic study routine.