The axis holds you. You do not need to "make" it, only to recognise it.
Stand or sit.
Feel gravity: let your weight drop into your feet or the seat. Feel your weight being held by the seat or the ground.
First feel your feet or your pelvis.
Imagine a line: feet → pelvis → belly → heart → throat → head. This is the axis.
Feel how this line holds you upright, without effort.
Stay here, breathing gently.