The tutorials I have watched for wood inlays use a traditional “V” bit, not a tapered ball nose bit. Not that there is a lot of a difference between them, but the “V” should give you better results.
@fenrus diagramed this well, these pictures helped me a lot… Using “Advanced VCarve” in Carbide Create 461 to make Inlays - Tutorials - Carbide 3D Community Site
I have accomplished handful of successful wood inlays using Carbide Create after getting some help. There some math involved, but once you visualize whats going on it starts to click.