Inductor not working
The magnetism you see from that coil will be very low.  The main reason is that the wire is wound on to a ring.  That means that the magnetic field has no need to leave the ring. Electromagnets are normally rods, or U-shaped.
The other reason is that you don't have many turns of wire.  Electromagnets have a large number of turns.  The insulation on the wire isn't a problem.