learning how to type

backspace with pinky
, with middle finger
Ctrl preferably with the edge of your palm
Shift and Alt with knuckle of pinky
y with right index finger
x with middle finger
ad hoc combinations using {Shift,Alt,Ctrl} should be on the opposite side of the other key--in general, maximizing the distance between finger press positions.

You should hit the right alt key with your thumb. By using your pinky, you're removing your hand from the home row and also straining yourself.