Can we use college graduation headshots for the professional headshot?
No, this is a bad plan. It would be better to dress in something business-casual and have a friend take a picture outside or something. You shouldn’t use your headshot to show you have an education – that’s what your resume is for. A headshot is used to represent you and your personality, and if you use a graduation picture, it gives the impression that you don’t care enough to have a legitimate photo.