Is there away to fix my body issues ?

I know at some point in mentally should just except my body change after pregnancy and csection but I’d love to see if anyone had luck fixing the issues I am having a hard time accepting about my body.

My skin is so wrinkly. It’s like the pores on my skin will never shrink, I know the stretch marks will fade over times will this ever get better? Is there a way to fix it ? Also my stomach I have a huge pouch not where my csection is but above it it’s like I have two creases now and if I am standing and take a deep breath that part of my stomach doesn’t come in. Will core exercises tighten it ?