If length is the problem, solve it before judging the overall style. Compare the 56 inch listing with your measured back length and the heel height you can realistically wear. If the back drags or the front lands at an awkward point, alteration may be the most controlled answer. A dress that fits the vertical line will always look more intentional than one rescued by extra accessories.
Decide whether it belongs at a wedding
A high low hem does not determine formality by itself. Wedding guest guidance from Azazie explains that fabric, styling, dress code, and balanced proportions all matter, and that footwear is especially visible with this hem shape.
For this dress, that means reading the invitation before treating black color and maxi length as proof of formality. The rayon blend and soft wrap shape may suit a relaxed or moderately polished setting more naturally than a strict formal code. A clean shoe, restrained jewelry, and a compact bag can raise the level of finish, but accessories cannot change the fabric itself.