high school grad dress - advice

Hello! I recently bought this dress from a local store and I’m considering wearing it to my high school graduation. It’s not the typical style people go for since I was looking for something more modest, but I was wondering if it might be too casual for the occasion. How would you recommend styling it, or should I look for something else? I really want to wear a white floral dress and found I few similar options on shein as well (third and fourth photos). I’m also considering returning the dress and getting one of those instead. What should I do?