If your intention is just to game with a select group of friends, you can find a few decent modules on the Vault. How well they will work with NWN:EE is always the question. So the biggest question is what type of module are you seeking? Action/Hack-n-Slash, something with a theme and if so what, a module based on D&D sources and then, which ones (3.0/3.5/4.0+ish or a Greyhawk/Forgotten Realms/Unique World)?
If your intention is to game with friends and meet more by publicly hosting your own PW, then several other questions need to be considered.
FaceBook pages and Discord Channels are all but a must these days. A forum that at a minimum has information on the specific systems and changes from vanilla NWN is always a good idea and it helps when folks find bugs (there are always bugs to hammer).
Speaking of bugs. Are you comfortable scripting?
Fast Leveling, slow to moderate leveling, attention to a theme or source books, these are things that “others” will want to know before joining. Keep in mind that you can never please everybody. Pick what you yourself enjoy most and you’ll attract others with similar tastes and play styles.
If your intention is purely to host something for a group of current friends, does it have to be a true Persistent World? Could a series of small modules/campaigns be used instead?
There’s at least a hundred more things to consider … good luck and let us know more about what you seek.
Lastly, why host at all if you can just join an existing world?