This is a Sunday brunch with the guys or family outfit! I feel like you don't have to wear dress pant to wear a blazer with a dress shirt. Just throw on some plain, simple jeans and add on that beige blazer with a neutral color dress shirt.
Dressing well is a sort of good manners. Smart casual is about adapting to the circumstance. May you have fun working with the recent trends to improve your inner goodess, locate your style and complement your physique.