Building Learning-design expertise in lived practice

As lifelong learning-designers in a broad sense, how, when and where do we develop expertise of learning-design in the life-long practice?

Ideally, we systematically develop the sign-system of learning-design, and use the sign-system to interpret and guide our practice.

We have so many opportunities of practice (of learning, teaching, designing), we don't want to waste these opportunities of building-&-using our sign-systems.

We want to situate our knowledge of learning-design in these lived practice. We want to use and refine our knowledge in lived practice.