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Here is a better view finished

I had little trouble too, but I then highlighted the ears, do an outline pattern, this will give you a dash line around the ears,
then using the “ arc tool” you can trace the dash lines better and...

I’m not sure if fixes the problem, see attached, I notice the ears line and the top of the face lines does not match, I also inverted the face and make the eyes stand out, you could play with the...