If I recall it right, turn the drum (neutral and e-brake released ,,, make sure the other wheels are on ground and chocked) till the round hole is at 6 O'clock position. Put the vehicle in part. Use a flat screw driver to move the cog (star nut) to lower the shoes.
The holes on the rotor are slightly larger than the studs. Try spinning the drum. If you can spin the drum then you have successfully broken the bond and you should be able to remove the drum.