When I use the sustain, should I press the pedal all the way down and go all the way back up?Currently, I depress it down fully then move my foot up slightly whenever there's a chord, or rapidly do that when there's an arpeggio.
That was most unhelpful. There is a right way to use the sustain. I don't want distortion and I need to know we how far to press down the pedal.
You cannot learn to use the pedals correctly, particularly sustain, without proper lessons.
Rubbish. You just need to experiment and learn to use your ears. I'm not saying lessons are useless, just that they are neither necessary nor sufficient.