Ok, to wear. Read description

So I got this as my kinda body positiv outfit about half a year ago, but was afraid to wear it. I have lost some weight now and I want to wear it, but Im still not sure if it looks good. (Btw. It is longer in real life, it was just a bit scrunched up in the photos and I will be wearing shorts under it)

Im not sure if I should wear spanks under it to smooth everything out a bit. So the blue is without spanks and the pink with.

(Blured some things out for privacy reasons)

Any advice how to style this or any advise at all is welcome😊