You have to move your feet around and see what works for you & your proportions. Literally just shuffle them forward and back and try each position also make sure your hips are tucked the whole time google a visual if you need to

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For me I have to focus on tucking my pelvis so that I’m really doing a kind of scooping motion under the bar. The best way I explain it to people is do the over exaggerated back arch that girls would do in like middle school to make their booties look big, and then move ur hips the exact opposite direction, pull them into your belly button. When ur pelvis is tucked like that it helps prevent strain on lower back

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