for a while I have wantd to make my own Undertale AU/story, and hopefully it can become widely known in the UT community as (head cannon) but i do not know where to to to start the AU, and even then idk what type of info to put ect..?

i do already have a planned out story for it , atleast for most of it - and i wanted to start it already.

how did UnderFell start?

what did you do to make it?

where did u start?

what should i and shouldnt i include?