I got married at the same age. I wore an ivory skirt and shell top (I did have a jacket as well, but decided not to wear it - I had a cream pashmina instead).
The skirt was plain, in a mermaid shape to just below the knee, which is flattering to pear shapes. It had a coffee-and-ivory petticoat just peeking out underneath, and the shell top had the same lace around the neckline.
In fact, the outfit was also available in black and looked just like an office suit - it was the ivory colour and the touch of lace that made it look just perfect for a wedding, and age appropriate. I hope that gives you some ideas and I hope you hav a lovely day!