Emoji / Emoticons Font help


i’m working on a kind of (black&white) emoji/emoticons font. I’ve been reading some information, but I feel a bit lost - it’s a totally new world.

This emoji font (file) will be associated to a normal Sans family. Is there any specific standard or logic when it’s time to order and name them? I understand that they should have their own unicode, but is it ok to asign :slightly_smiling_face: to the letter A (on the keyboard) for example? The idea is to make them easy to find in an Indesign/Illustrator environment.