There are things in sobriety that are probably best left to the side early on, while one focuses on the need to nurture one's own recovery. It's not necessary to get people to immediately know that you are sorry, but it is vital that you do be sober. Is your motivation that you want them to feel better or that you want to feel better about yourself right now? Behaving differently from a distance may or may not be noticed by others. Leave it up to them to see that you are changing, rather than trying to see that they do notice. The responsibility for prior actions is going to be there forever, whether you feel that you can make amends in some way or not, it's something we have to live with and finally find either self-forgiveness or equanimity.