I like the flow of your lines. Starting very thin and slowly widening, very graceful. It shows good control. Im not sure you are finished with it. As far as improving your engraving I would just say more. It looks good.
Looks like you have very good tool control with the design you drew, so now you are ready to study correct designing of a leaf structure and spiral, and refining your drawing skills. Learn how to construct a proper graceful leaf. Your cutting skills seem to over shadow your knowledge of design, and design is where you will really shine.......Keep stretching, Keep drawing, and keep posting........Lookin' good!!
The objective is to continuously keep refining what you know till you get it right, both cutting and drawing. But understand it will take a while to get to where you want to be, and don't give up. It gets frustrating sometimes, but practice makes perfect.