The first idea is wearing it like a dress with a tank top on the inside and a belt around the waist! I paired it with wedges, because it looks better this way, but you can totally try it with flats, especially if you're tall (unlike me)!
And now the second idea! You can wear a long vest like this, open, with a nice top and a pair of shorts on the inside, or maybe even with a short dress to highlight the contrast (between a long and a short piece)!
I hope you found some inspiration in this post! More "1 piece, 2 ways" posts coming!