need help with texturing a face

hello reader
i have been thinking about making a model and then texturing the face of it this model will be human so i dont confuse you lol but i dont no how to add a texture as the skin of the model and is it possible for me to take a picture of some ones face and in a way paste the face to the model as the texture?:spin::spin:

that’s done with UV mapping.

ok tnx for the info