Azurewraith
Explorer
I think it will be fine if anything going off "core" could be better as it helps show that dnd can be anything. Just make sure to let them know its not your typical high fantasy setting.
As fore rules id try and stick as core as possible with little to no house rules just to help it flow for those with rough ideas
As fore rules id try and stick as core as possible with little to no house rules just to help it flow for those with rough ideas