Don't give any stones to the Warrant Officers, yet. Just accumulate all the NU stones you can.
Your first priority as a new player is to get enough stone, of any type, to trade for steel picks to use instead of the free iron ones. Though with few people playing until the game develops further, that may be difficult.
The Warrant Officers will eventually ask for 500Kg of each stone in turn, and you will need 100 PNotes to become a citizen. Yes, that is a long time, even with steel picks. A steel pick gets 500Kg in about 30mins.
So far, I have found 3 good stone areas in NU
- W, below the transmitter, either side of the road (mix of Zones 1 & 2 ?)
- E, beyond the road leading to the SE gate (Zone 5)
- NE, up near the top fence (Zone 5 leading to Zone 4)
I have noticed that these areas are a long way from the buildings, all the stones around the buildings are non-pickable. I hope this is addressed in a future update, as it takes too long to run to them. You are also forced to expend a clone to get back or waste more time, but at least you can then be overweight.
Trade some stone for a backpack if you can, this increases the weight you can carry.