Effy Stonem is a real source of inspiration for me. Her mysterious looks are so beautiful. You know, it's always magnetizing when a girl is a secret for others. Like Ef. I think, we have a lot to learn from her. Let's start with looks first.
Effy is known for amazingly short dark dresses and lots lots of accessories. Use as much bracelets as possible. Better if they'll be big. And wear lots of long chains and beads. With short dresses better wear no tights or leggings. Choose high soldier boots instead.
Anyway, if you are not ready for changing your style so sharply, at least learn to wear accessories as Effy does. And try to think of using dark colours in the outfit.