It's just a copy from a picture in an animal book, if I remember correctly.
Yeah that's right, it will take some time to get on that level, but still creating slowly pieces (I know how it feels like, when you create something in a new medium or haven't used since ages, and sometimes it feels like "hey it isn't good as my recent-medium piece!") traditional pieces is always a step. This one already is good and I wonder how it will be like after a few next pieces next. Same it was with my digital where I had very hard time to "break through it" and I feel like I'm catching a flow and soon I'll be on similar level like with my traditional as my main medium. Honestly, I'm already quite curious for your next traditional works :>
Good luck! <3