Remember, just because you like a style in a magazine, does not mean the style will like your body type.
Bright blue eye shadow is NO GO.
Think about where you are going and what other sophisticated women might wear there. (Don't get dolled up in 4 inch heels and a bodycon dress then head to the grocery)
Practice in front of the mirror first. Maybe even film yourself.
Practice makeup before just throwing it on and heading out the door.
Practice walking at home on slick floors, on carpet, in the grass, on concrete.