I hope you can read my handwriting, also i'm not so great at explaining incase you didnt notice TAT
anyway, thats basically how i do portraits if i want them to be super realistic. for the final image i just did the hair and put some texture in the background which is only visible on certain screen resolutions apparently
maybe i'll do a hair tutorial at some point since i get that requested a lot.
Let me know what you think and if you want me to clarify something just let me know!
Final Image: [link]