You may get it on the first try but it always takes me 3.
Every bike and wheel is different.
In this order: Bolts / Sprocket (start with the dished part in) / rubber doughnut / spokes /rubber doughnut split to go over the hub shell / metal moon clamps / flat washers, lock washers, nuts.
You may need to flip the sprocket over so the dished side faces out and if you got extra metal plates they can go right behind the sprocket to shim it out a bit.
Once you have the correct alignment for the chain and the sprocket is not hitting your frame you will need to keep tightening the bolts as the rubber washers get broken in the sprocket can loosen up and slip.
You may need to open up the outside rubber doughnut thing on the ID so it clears the hub bearing shield.
You may also need to dog leg the coaster brake arm.
I hope this makes sense.