To have a fantastic core you need to strengthen and engage your core muscles in a move called the dish shape, or the hollow hold.
This video starts you on the road to the perfect dish
I like this move because you can learn it at home!
The value of this move is that it starts you on the road of learning the handstand. You take the shape you have been learning, make the pelvic tilt more obvious, build it into a plank then walk the plank up the wall!
All at home!