I recommend giving it a try, since you've got a setting and thematics set up already. It doesn't take too much to be able to make your own crunch/mechanics - since you already have themes to rely on for flavor, you can make a stronger product than the guy that tries making an omni system (such a system has little flavor because it can't rely on themes).
I make systems as a hobby (I refuse to publish until I make a perfect one), and find theming to be a struggle because I kinda hate creative writing. Hopefully you don't have the opposite problem and hate doing mechanical writing.
Small recommendation, but you might want to look into reading transcripts of pnp sessions. I have a very small number of sessions under my belt due to social issues, so I try to fill in the gap where I can. It's somewhat ironic, because a large part of the point of pnp is the social experience (and another large part is that it's basically cooperative storytelling, which a writer may get a kick out of).
I recommend giving it a try, since you've got a setting and thematics set up already. It doesn't take too much to be able to make your own crunch/mechanics - since you already have themes to rely on for flavor, you can make a stronger product than the guy that tries making an omni system (such a system has little flavor because it can't rely on themes).
I make systems as a hobby (I refuse to publish until I make a perfect one), and find theming to be a struggle because I kinda hate creative writing. Hopefully you don't have the opposite problem and hate doing mechanical writing.
Small recommendation, but you might want to look into reading transcripts of pnp sessions. I have a very small number of sessions under my belt due to social issues, so I try to fill in the gap where I can. It's somewhat ironic, because a large part of the point of pnp is the social experience (and another large part is that it's basically cooperative storytelling, which a writer may get a kick out of).