Which dress?

I have a wedding in September in Tennessee. I know it’s gonna be hot but I want to cover my half sleeve tattoos so I picked 3/4 sleeves. Don’t pay attention to the color. I already have a color picked out :) I’m 5 foot 8 and 150 pounds so I’m neither larger or smaller. I’m leaning towards the first one. I am not a girly girl and have never work a dress so I have no clue hahahaha