Been around the block
To have a lot of experience in life or a specific situation.

Cut your teeth
To gain initial experience in something.

Old hand
Someone who is very experienced in a particular field.

Live and learn
To gain knowledge and experience as life goes on.

Trial by fire
Gaining experience through a difficult or challenging situation.

Been there, done that
To have already experienced or done something.

School of hard knocks
Learning through difficult experiences rather than formal education.

Cut from the same cloth
To have similar experiences or background as someone else.

Learn the ropes
To learn how to do a job or task through experience.

Baptism by fire
Being thrown into a difficult situation where you must learn quickly.

In the driver's seat
Being in control of a situation due to your experience.

With flying colors
To succeed easily or with great success, often due to experience.

Wisdom comes with age
As people grow older, they gain more experience and wisdom.

The benefit of hindsight
Understanding a situation clearly after it has happened, based on experience.

To know the ropes
To understand how to do something well because of experience.

Experience is the best teacher
The most valuable lessons come from personal experience.

Old head on young shoulders
A young person who shows wisdom and maturity, often from experience.

Been through the mill
To have experienced a lot of hardship or tough situations.

Seasoned pro
Someone who is very experienced and skilled in a particular field.

Learning curve
The rate at which someone gains experience or learns something.