If hub has oval holes due to wear and an earlier bad aftermarket 16" setup make it a little bit trickier.
Tighten all equally step by step rotating the wheel.
My last 3"-18 alu wheel was not that easy despite a low mile hub with good holes, new rim and spokes with tight fit.
Had to release spokes and tighten the right ones again while rotating.
Marker pen on the side and inside when rotating marked the stick out.
Just to continue until its ok.
Photo is the alu front wheel.
Indoor job in living room. A sheet under protected the floor.