its hard to learn power cleans without a coach with just the barbell, i personally needed to add weight to “feel” it.
basically i think the difference between a power clean and a normal clean is that in a power clean you also use your arms and you try not to go very low when you try to get under the bar.
first position yourself above the bar in a very similar to the deadlift position, except your feet will have a wider stance(shoulder width). as for toes where to point, its not very important, but as a newbie point them outwards a bit.
put the weight on the front part of your feet but NOT on your toes, just behind your toes.your shoulders should be in front of the bar, your chest should be as up as possible and your back straight with a curve towards the good curve it can have ;). make sure your arms are fully extended when you pull.
now without leaning forward or backwards (hips rising too fast, or back rising too fast) make the first pull, till it passes your knees… this pull doesnt need to be as fast as possible. doing that as a newbie will probably just get your legs scratched and the barbell will fly towards random directions.
after it passes the knees extend your legs/hips/back as fast as possible while the bar is very close to your legs. make sure you dont hit your balls. it hurts. personally i think of these things: push feet into the floor. “push” my knees backwards. push my ass forward (just like sex), push my back backwards. meanwhile, your face should look forwards, not up or down. this is mostly so the bar doesnt move forward or backwards, and to not get injured.
the bar will eventually reach around waist level when you are full extended(remmeber that you must do the second pull and especially the push of the hips forward very fast), this way the bar will hit on your waist. while it does that, you must also shrug your shoulders, that gets the bar even higher, and also stand on your toes, that makes the bar go a bit higher. and since its a power clean use your arms too to get it up. dont think too much about your arms, they probably will be used naturally.
after that keep pulling with your arms and at some point you should be turning your elbows out and getting your body to squat under the bar.
oh and practice squatting under the bar. its basically the opposite of pulling the bar upwards… but also since your feet will be up from the pull this is what i think:push heels downwards till they touch the floor, push knees forward,push butt downards, push back forwards. the only exception is that you should also make sure when you get under the bar that your chest is up, otherwise your balance is off
practice parts of the power clean, its too hard to learn the whole movement all together… you need to think of like 50 things in just 2 seconds.
oh and try to push your abs out and keep your back tight