Ok, I already wrote this out once and it was blank when I posted! Lol!
What I do is, get under the bar, hunch my shoulders so that my traps make a kinda cushion for the bar, I also use a sponge pad to cushion it as well,
This is gonna feel strange to you at first but try it a few times. Put that bar lower on your traps. If you expermint you should find an actual notch on your scapulas. Thats where the bar should sit. Then no need for that pad. This is typically the issue that peeps have when feel the need for the pad.
I hold the bar with my hands in the same position as if I were doing a bench or BB row,
whatever is comfortable for you bro on hand spacing.
I set my feet about shoulder width apart with my feet pointing out ever so slightly.
Go WIDE on your stance bro. Go well outside your shoulders. You are not going ass to grass so WIDE is all for you my friend.
I breathe in on the way down and hold my breath from about 2/3 the way down and start exhaling about halfway up. On the way up I'm thinking about my glutes, kinda thrusting my hips forward rather than just "standing" (up which I find uses my back more, if that makes sense).