What do I do now?

So I have been playing on a multiplayer server and we have completed the ‘expand your kingdom’ objective.

What do I do now? I thought NPC’s gave you quests or there were some other things to do. It took us about 5/6 hours to complete the quest and now there doesn’t seem to be anything else to do.

Any help or ideas would be good.

I even built a full wall around the village and I have mortars firing constantly so I feel like I’m in the end game