Zackary Stark

Wedding invite says: The dress code for our wedding is semi-formal/ cocktail attire. Guest should wear cocktail dresses or a suit and tie or a sports coat. Please no jeans or shorts.
Wedding will be in Southern California, at an outdoor, grassy area (not beach) in early November. Thank you !

For context, I’m wearing this dress to my sisters wedding. It will be outdoors in the mountains of Colorado in a few weeks. I’m open to anything- heels (small), boots, flats, etc. I just lack any sense of fashion so suggestions would be appreciated! Thank you!!
Edit: dress fits me like the model. Bottom of dress also hits my ankles