Need help: I fumble a lot in PM interviews

I’m a PM with ~5+ years of experience, actively interviewing for senior PM roles. I’ve noticed a consistent pattern in my interviews and would love some advice from this community. I usually understand the question and even know the right concepts/frameworks, but I still end up fumbling: my answers come out messy, I jump between points, and I struggle to structure my thoughts clearly under time pressure. Because of this, I’m not able to represent my actual experience and skills well. For folks who’ve cracked PM interviews at good product companies: • How did you train yourself to structure answers better (especially for product design/case and behavioral questions)? • Any specific frameworks, templates, or mental checklists you use to keep answers crisp and logical? • How do you practice so that it becomes natural in live interviews (mock interviews, recording yourself, specific resources, etc.)? • If you also used to fumble but improved over time, what made the biggest difference for you? I’m looking for very practical, actionable tips (e.g., exact structures you follow like STAR, sample outlines you use for product questions, or daily practice routines), not just generic “practice more” advice.