Fall wedding guest dress

Hi ladies!

I am going to a wedding in September and they have not listed the dress code on anything. But the reception is at a social club so assuming it’s fairly fancy. The ceremony is in a Catholic Church.

Do you feel this dress could fit in 1. In a church 2. For a unmentioned dress code. Hoping it could fit it if it was either cocktail or formal.

I’m not close with the bride. She is marrying my boyfriend’s cousin so can’t really ask her!