Place my picture into another picture

I want to put a picture of myself into an AI sort of picture. The pic that I want to be into is a young woman with a light saber that you can see reflected in her glasses. Since I'm a laser engineer, I would like to substitute a green laser beam for the light saber. in some type of laser lab. I'm just not sure how to accomplish that. I would like to have three different pictures with slight variations. Instead of a cigarette, I would like to use a thin cigar of the same size. My pics are below and while I don't have sunglasses on, I would like to have a dark thin set on my face so the light can be reflected in them, similar to the pic.