So Camera came in the Mail.. You opened the case.. and now what?
We need film. For your first roll I recommend something cheap from the Drug Store or Walmart. And I'd look for ISO 400, anything will work but this will be easier.
To open the Camera, Twist the Lens so the two knobs are vertical. Then pull the Lens out away from the camera body.
Each strap mount is made to pry the camera apart. Place the tabs as shown and press down, Lift the camera out.
Insert Film as shown, Passing under the Pressure plate and Hooking into the Spool.
Reassemble the same way as you took it apart.
Prior to Rewinding the film make sure the shutter control is turned to 'r'