for the first attempt, you could just stick with steady-state simulation. it would be much easier. anyways
Assign your fluid domain to both volumes. that can the water become in contact with your propeller.
you have assigned your inlet and outlet surface on your wall boundary condition too.
in fact, you should not assign wall condition for any of the bounding boxes to ensure your flow doesn’t
affect by the wall condition instead use the table below to assign you boundary condition
you should get your center of rotation to the center of the geometry which is in this case ( 0,0,0)
use this public project as a templet.