The most important thing: how do you want your character to develop? What sort of crazy powers would be super cool to have? What sort of allies/enemies would be awesome? :3
The plot is secondary to these things!
Well basically I've been trying to set up Emma for some development- right now although outwardly she may seem confident and bubbly she's really dealing with a lot of internal struggle. Over the fact that she killed someone and over the fact that she wasn't able to help Spook. She thinks she's altogether pretty useless- what I wanted was to gear her up slowly into a real Traveler. Maybe she finds someone to teach her how to swing a sword or use magic, basically I'm trying to head in a direction where Emma stops being so useless and becomes a badass. Also, of course, she's out to find some dank plants.
As far as plot direction goes we should build off of our characters and the world. Some of our characters have sordid pasts and that should catch up with them. As for the world so far it is a pretty blank slate but it's wide open for development. We have these walled cities, but that's about it, so we've got to ask- Why do all the cities have massive walls? What's the big threat in the outside world? What's the outside world liked? Who lives there, or what lives there? There's a lot of chance for some very unique settings. I think the big problem with plot direction is while it should be about the characters, who've lived inside walls their whole life, discovering what exactly the outside world is, instead we're caught up inside Cogswall in the middle of a rebellion that they have no stakes in. We don't really know enough about Cogswall for it to be interesting or for our characters to be interested in it in turn. I think at this point it would be best to ditch the city and get outside, the world beyond the walls could be potentially brimming with mystery.
From there we can go lots of different places. Maybe the Travelers as an organization don't really like the fact Spook went and got a bunch of random people from a city and slapped the name 'Traveler' on them. Maybe they want to know what exactly happened to him and why Cogswall has been destroyed. But then again we get trapped inside the same sort of 'tutorial area' at the start of the story and they end up once again in an area that isn't super interesting. So maybe instead they just go out and find something fantastic- like I said the world is an empty slate, there could be anything beyond the walls. The natural place to go would be the compass that Spook gave to Emma, it just screams 'follow this and find something really cool'. What I'm getting at is the outside world could potentially be teeming with mysteries that are as of yet undiscovered and fantastic sights that are as of yet unseen.
Those are my aimless ramblings on the matter.