keep at it & have fun.
Get as close as possible with a table or band saw. If you are not adverse to using a power tool, a Dremel with a rotory bit will be a big help.
In the past I have caved a face in a soft balsa wood model, a pine wood derby car.
An arm & hand in mesquite. Most recent was a handle for a hatchet. Will try to find the picture of it.
All of that was with an exacto knife. They make a nice set for a few $$$ that is a big help. Al-tho is it on my projects.
Wall world has a nice set for about $20. Cheep lathe tools from Harbor Fright will also be a help.
Enjoy.