You can't be productive and efficient and at the same time expect to be creative and learn a ton of new things.
This just doesn't work.
Productivity and efficiency are basically the opposite of creativity and learning new things.
Productivity and efficiency are all about doing things you're already relatively good at as fast and as good as you can.
On the other hand creativity is messy and doesn't really follow any pattern or a given time frame.
If it happens it happens. Some days you might be able to create something while other days you won't.
The same holds true for learning something new.
Just like creativity, learning something new is messy, time consuming and very inefficient.
The exact opposite of productivity and efficiency.
So don't beat yourself up if you can't be both at the same time...