HELP!! Barefoot for someone with “duck feet”?

Hi I’m 26, i have low arches and when I stand, my feet are pointing outwards like a V
shape.

I am experiencing very hard foot pain when I’m walking barefoot at the evening after walking all the with cushioned shoes with orthotics.

I did ultrasound and I have plantar fasciitis in both of my legs and probably Achilles tendonopathy. because of my posture I also have anterior pelvic tilt and stiff lower back which is painful.

very important to say that I’m not overweight, I’m lean and have muscle on me.

did anybody has the same problems as I have and managed to fix them? I really need help