Today's outfit mostly consists of items either thrifted or gifted! So it will be hard to tell you where to find the items, but I can try to help with brands, at least!
This dress is one of my very favorites. I wear it all spring/summer, and then just add tights and a cardigan once temperatures start to drop! I love the ruffle detail in the front and the crocheted lace back. You can be daring and just wear a bra underneath and let it show, or certainly be more modest and wear a cami so that the back is more covered.
Dress: Bailey Blue, thrifted, found at Plato's Closet
Belt: thrifted, found at Plato's Closet
Cardigan: Mom's closet (no really, my mom's closet) (I think she's always wanted it back) (Nope)
Patterned tights: Gifted
Shoes: Aerosoles (I believe the style is "Vivian," but I can't find a direct link anywhere online)
Glasses: Zenni Optical