Are we allowed to share websites? If so, "Thevirtualinstructor.com" might have some useful resources. They have some videos on drawing noses, eyes, etc. and some full portrait videos.
A lot of them are member only, but they do have some free ones.
Something else that might help that I used to do... Look up contouring for male/female faces. Most will be makeup guides, but you can find images with the different planes of the face highlighted or shadowed depending what features you might want to stand out. While there's artist guides for drawing the face that are similar, I found makeup contouring guides were sometimes handy to show me where I can put my shadows to help bring out the eyes, cheeks, etc.