This is looking really nice so far. The only thing I can say is try to keep it lower poly. Keeping the count lower will help with tweaking the features along the way and make merging vertices a less painful process. Plus you won't risk having such a high poly count if you decide to subdivide. I've completed two female character models and that was probably the most important thing I learned.
That aside though, the shape of the face and the features are looking good so far. Looking forward to seeing more!
