"Worry"? That seems like a strong word here.
This is a game that I enjoy playing. I have never tracked how long I take. Many days, I do only a single lesson. That's less than 5 minutes, sometimes less than 3.
I'm not trying to be fluent. I'm not really _trying_ to achieve anything. The closest I have to a goal is that I enjoy having another language's vocabulary that I can use when speaking around my children.