Being meaningful and being engaging are distinct.
Engaging means fun in the moment; enjoyable for its own sake.
Meaningful means that afterwards you think "I'm proud I did that"
Not engaging and not meaningful: waiting in line at the DMV.
Engaging but not meaningful: an addictive mobile game.
Meaningful but not engaging: volunteering to do menial tasks for a cause you believe in.
Engaging and meaningful: big talk with an important person in your life.
It's possible to find meaning in just about anything if you're open to it.
If you find something that's both engaging and meaningful, pour your heart into it.