You should take cuttings (internodal) in other words between gap between the leaf nodes.
Use a very sharp knife and remove some of the larger leafs to compensate. Pot in sandy soil water in and cover with a opaque bag and elastic band to keep the moisture in.

Place in a bright but not sunny location.

Altenatively peg down an in situ internodal area of stem after slicing half way through and eventually this will for its own root system and can be cut from the parent plant and potted.