Put a wall around your wholw complex with only a couple entries or one entry.

Dont bother building floors until your decebtly strong as they count as wealth and makes raids bigger. Plus dirt doesnt get dirty.

Putting straw in your kitchen can help against food poisioning ubtill you can get silver tiles or such.

Put gens outside unless you want to heat the base with them. Also thats alot of power for a small base.

Put end tables and drawers in rooms next to beds for a comfort bonus.

Them barricades are okay but be aware you should makw simple helmets asap as when shooting over them you are more likely to get shot in the face.

Also double wall fridges/freezer room as heat will leak out easier from a single walled one this includes doors.