Courtney @bestcee said it best: take the photo. Take lots of photos. Delete the ones you don't like. Maybe in the beginning, that will mean that you delete them all. But keep taking them. I really dislike how we are trained to be something other than what we are. I know that taking selfies over the years has helped me become accustomed to seeing myself and that I've grown to accept quite a bit that at first was too hard to even look at.
Agree with others... and honestly if I didn't take any selfies I would have a small handful of photos from the last 20 yrs, mostly at special events only. I'm glad I have the selfies - seeing changes in me - everything from aging to hairstyles, moments frozen in time with friends or family.
My iPhone has a ten second timer that my daughter showed me how to use. It usually takes me that long to get the angle right.