When taking cuttings, use sharp secateurs to cut a stem just above a leaf on the parent plant. When removed from the plant, cut the stem just below one of the low leaf joints and then take off the leaves from the bottom half of the stem cutting.
Then, the base of the stem can be dipped in hormone rooting powder, which reduces the risk of fungal infections and increases the chance of rooting. Then, plant the stem into cutting compost, with the lowest leaves just above the compost level. Keep the compost moist to allow the cutting to settle in.
To boost growth, use thin canes in the pot as a structure to wrap a clear polythene bag over the plant and position the pot in a warm spot that’s not in direct sunlight.