Having well draining soil is crucial for succulents and that is why most of my succulent gardening is done in containers, whether indoors or outdoors.
For your information, succulent roots do not get water from direct contact. Rather, they absorb the water molecules in the air. This is why having a succulent sitting in sopping wet soil is so problematic and makes the plant rot.
Make sure your pot has a drainage hole otherwise there isn’t any point in having well draining soil as the water will just sit in the bottom of the pot.