Sophisticated

Having refined taste, knowledge, or experience of the world

Storm in a Teacup

A lot of commotion or fuss about a trivial matter

Fit as a Fiddle

To be in very good physical condition

Don't Judge a Book by Its Cover

Do not judge something by its appearance alone

Paddle Your Own Canoe

To be independent and self-reliant

Savvy

Having practical knowledge or understanding; shrewd