20 minutes a day: What’s the most efficient way to practice listening?

As a busy professional, I only have a small window of time each morning. I’m tired of basic apps that just teach me 'hello' and 'goodbye.' I want to actually move toward listening comprehension, but it’s hard to find graded input in Wolof that isn't either a children's show or a fast-paced radio broadcast. Does anyone have a specific routine or source to bridge this gap?