WDIRARAWomen's Polka Dots Sheer Dobby Mesh Square Neck Long Sleeve Skinny Bodysuit

Can you wear this without a bra?

Are the white and off white descriptions accurate? The pure white looks to be off white and vice versa.

Is the bottom full coverage or a thong?

5'1" and 123lbs. Mama belly and big arms so sometimes, I can't do smalls with tight long sleeves. Are the arms roomy?