Is this dress appropriate for a wedding?

I'm 21 and never been to a wedding, I also don't wear dresses but fancy dressing up a little as well it is a wedding! I'm so unsure weather this is okay to wear, is it too white? For some reason in my head white is a no go unless you're bride/groom or brides maids and ect! This dress is also under £30 so well within my price range and I love butttt as I said I've never worn a dress and being a curvy size 14 I've never felt confident but this dress is like screaming at me😂

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