Oh my days. Holmes has literally been drawing for years and years on end as both a hobby and a passion. Put that level of work in and of course you'll be awesome. I highly doubt you've even been alive long enough to have put that many hours into this hobby. So here's the common sense answer that not-even-very-deep-down you know already: put in the elbow grease and you'll learn. It takes time and practice, and comparing yourself to someone who professionally draws for a living and has done so for years is ridiculous.