Tips for applying mineral makeup with kabuki brush?

This may seem like a dumb question, but I'm a makeup rookie! I recently bought everyday minerals natural reflections loose powder to use as sunscreen (to reapply over my usual sunscreen mid-day), and I bought a kabuki brush to apply it with. So coverage is obviously a factor. Because the powder color blends into my skin so well, and the kabuki brush is so soft, I'm not quite sure how to tell when I've achieved "good coverage". Is there a certain amount I should start with on the brush? Is there a certain way I should be applying it? help!
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MAC 182 buffer brush kabuki, on sale