A Good SFI photo is very important , especially for new PSA because you and your photo are the first thing they see most often and by that you represent their future image during the program. There for, your photo should show character, dedication and results.
Make effort to do a good PORTRAIT (not selfie, not a random image) that is going to give hope and vision of the PSA for what they are going to get in future if they work and keep working. Very simple!