Ok, to downshift one gear you have two main options: the blip and the slow-release.
Slow-release (aka what you learn in MSF, the “easy” one):
1. In one motion, pull in the clutch lever and roll off the throttle.
2. Click down one gear with your left foot.
3. Release the clutch lever slowly (e.g. seconds) and let the engine speed back up while slipping the clutch. Once the engine has revved up, smoothly crack open the throttle.
Blip:
1. In one motion, pull in the clutch and roll off the throttle.
2. Simultaneously click the gear lever down one gear with your left foot, and with your right hand rev the throttle hard and quickly: just on/off.
3. Right when the engine revs start to fall again, release the clutch lever to re-engage the engine and smoothly roll on the throttle. Make sure the clutch is at least in the friction zone or all the way out before you get back on the gas.
Does that make more sense?