That looks mighty putty.
You might need more ventilation. Also, they might pick at the OSB board.
If you are planning that 6 will roost on the middle rung and 6 will roost on the lower rung, be prepared to have 12 roosting on the upper rung. If they do that you could just move the food and...
If it was lower it would withstand wind better. You want a panel side on the wind side. The wind will just roll right up and over if it is not a straight side. You would loose height, but gain width.
There needs to be a frame at the base. Then, you build a frame for the door, or possibly two...
How dry is the area? I have heavy clay and in the spring new ponds appear. If you have a septic field, that will be the highest place and probably a good place to put the coop, it is where we put ours.
If your spring is wet and muddy, you need a place for melting snow and ice to go. Think...
Which direction do the strong winds come from? On that side make the wall curved so the wind will go around it. If you can't make a curve, then put a corner on that side so the wind hits the corner and goes off the right or left. Make these walls longer than the walls they are attached to so...
One thing I would have liked is a pipe for water from the house to the coop. It depends on how many chickens and turkeys you have and how difficult it is to carry the water.
Depending on how far from the house the coop will be, an electrical extension (wire buried underground in a conduit pipe)...
Feed them in the coop. A meal in the morning, a meal midday, then a meal well before dusk. Once they are in the coop shut the door. Do this for two or three days. You can then put the food right in front of the coop and see if they will enter it on their own.