Someone with no magic & form can teach someone with magic by existing.

Magic today can be a lot of things,

They call this movement. Movement of a single object like a pencil slightly to the left can inflict chaos theory. You know flying?

What if you had to figure out how to do that without wings?

You know farming?

What if miyagi only had waxing his car?

You must learn how to pick something up before you can throw it.

There is magic in metal

I guess, start farming; or getting stronger, maybe just learn something new, something you actually want to do?

Find new things you like as well, and do them as well.

You'll start to learn what magic is and maybe you'll figure out how to cast a fireball out of your hand one day.