A good beginning! getting started is often the hardest part.
Did you cut the border also? It looks good.
Some things to remember. Check your point often, especially if you have any difficulty controlling the tool. I often made the mistake of thinking " i'm not doing well today" when it was a microscopic break in the tool point. Some sort of 30X loupe or microscope will help you inspect your points. Secondly, holding the work securely helps with the smoothness of the cut, and the longevity of the tool point. Vibration is bad! It is not always possible to entirely eliminate it though.
What kind of hammer are you using? Chasing hammers are often sold with the handle left too thick in the middle. The springier the handle, the better. Again, it helps tool points and smoothness of cut.
I prefer wood tool handles for lighter cutting, and metal handles for heavier cutting. Differing weights of chasing hammers can help also. Similar to blacksmithing, change the hammer, not the stroke. The contrast betwen heavier main cuts verses lighter shading cuts improves the appearance of the work. You may want to try some hand pushing also, to make your shading even more delicate.
I know that is a mouthful; hope it helps some.
keep up the good work!
take care,
Tom