Hiya there! Nice to meet you! I'm new to the site--but not new to world building and roleplaying! World building can be incredibly deep. We have issues from simple setting to as deep as how the calendar of the world works. Languages, ways of communication, to simple gestures such as how one invites a guest into their home can be covered. History is also incredibly important to a world. If you really want to build a very in-depth world, or even just a nation, you certainly have a lot on your plate. I'd really be interested in helping you out--if you'd want me to.