+1 but i think you shouldnt sit... it's hard to learn good STANCE from sitting. but other wise goodCheck that the pistol is unloaded.
Check again that the pistol is unloaded.
Now, check again that the pistol is unloaded.
Now get the snap caps you bought. Load it (use the magazine, don't drop one in the chute and let the slide go forward. Feed from the magazine.)
Sit in your favorite chair.
Remember the four steps of
Squeeze the trigger,
(a good aiming point is the light switch across the room)
Cock the hammer and fire.
You did make sure the real ammunition is stored away from where you are doing this, right?