Loading the film.
With depressing "1" (shown in the left picture), pull up the rewind lever to open the rear cover.
Insert the film cartridge and slide the film leading tip into the take-up spool, then rewind a litte to tighten the film.
When loading is done, close the rear cover and make blind exposures a few times until the frame counter shows "1" in the window.
Set the film speed of the one you loaded with the film speed setting ring.
Now you are set.