i want to build a big civilazion wi...

i want to build a big civilazion with above ground light and peacful underground i want it to be alot of caves secret doors and one realy big area with all soul lanterns and houses like clif houses and underground house with bridges connected ALL the caves has to be leading to the big area and a bridge i want secret doors to be faster to the main underground area i want above ground a mob farm a suger cane farm and houses for peacful players with a wall around the above of our civilazion with oak logs and dripstone on it with one big entrance on front to go in and out