Cut holes too big and need help cleaning them up :/ Sewing Machines Parts and Sales in Los Angeles

Context: I have a dress with a long slit in the side. I decided to ad some corseting, so to speak. I’m an amateur so instead of thinking “get a tool and do it right”, I decided to cut diamond shaped holes. Well they’re bigger than I wanted and the material is chiffon over a cotton/polyester blend.

What can I do to clean up the rough edges of the holes and make them look a bit more decent without going too drastic?

TIA.