You asked for a slow rotation and I answer which node you should use: RInterp To.
- Feed the “target” of the node with your “Find Look at Rotation”
- connect the “current” pin with the current turret rotation (GetWorldRotation).
- connect “Get World Data Seconds” to Delta Time
- Ajust the rotation speed you want.
- exec the node until the “Find Look at Rotation” rotation and the current turret rotation are almost the same
- Once they are the same, start your firing procedures