Fashion advice needed please ๐Ÿ˜˜๐Ÿ˜˜

Okay so I'm going to a wedding on Friday and want to look my best. But due to me being fat I really struggle with my confidence and not no good with fashion. I brought this dress and fell in love with it but can't find a nice jacket to go with it. I've got these two cardigans and still don't know if it looks ok. My sister told me that I look like a giant peach. Please help me!!ย