hi kindergirl!

we are not in therapy so it's difficult to say what the right way to map is, but i have (tried) to do this myself, and some parts of me have been a bit more successful at it... basically how i do it is basically a list of everyone inside that i know and how they are related to each other (if they know each other etc, who they split from, me or somebody else, stuff like that). it's ok to not know all this at first, put what you know on it and question marks or empty circles (i do it like a "thought map", usually i put myself in the circle in the center and start drawing lines from there - there are other ways to do this, too, no wrong way) are perfectly ok too. i've seen some people also write the distinctive features of each alter or small snippets of info about them.

hope this helps!