New server spawn! [Need Ideas]

Hi there! (: I am attempting to build an entire custom spawn ffor my server. this is what i got so far. My main problem is i can do detailed walls but it seems like that is it.. lol. Basically im wanting help from anyonne out there od how i can add on to this.

The idea is to have this wall to go in a square but i need pillars and a gate as well. If anyone has suggestions or could get on the server and help me thatd be great! Maybe some of you have build or know of build i could look at for inspiration.

**The main thing i DONT want this to be is just a "open top castle" I wanna either make this into a building preferably or make a bigger building in the middle of it. Thanks!!!

SERVER IP: 72.46.130.66:26357