I did absolutely 0 advertising whatsoever all the way through chapter 2 or so. Kind of a personal experiment to see if I could build up my storytelling skills enough for it to speak for itself. Even now, I dont really advertise it being a comic. Not loudly, anyway. Point being, I have no idea how to advertise it because I myself have done no such thing. 8) Probly promoting it, posting on forums about it, showing your friends, I dunno.
I actually tried my very, VERY hard to not make a PMD comic, but Gates to Infinity made me angry enough that I accidentally adopted it as my sole objective to tell a better story than it did. Basically, I started thinking about ways the game could have ended that would get more of an emotional response out of me, and then it just kind of snowballed and grew from the idea I had for an ending until it became mostly my own thing.
So yeah basically I just tried to avoid it, found out it was impossible, and worked backwards, starting with really big things and filling in details after having a chance to process it. \o/
As far as characters go, I started with a very basic idea of what I wanted. Wrote some bullet points for each one’s past(including Avis) and try to incorporate their experiences into how they interact with each other. Can’t really go into too much detail as far as examples go, but there’s an idea to start with. If you dont know what you want, write down ideas and decide which ones ultimately work best for the kind of story you plan to tell… I dunno, haha, I just kind of wing it tbh