Why is it important for a succulent container to have a hole at the bottom?

The hole lets extra water escape so the plant's roots don't rot.

What kind of soil is best for planting succulents?

Soil made for cactus and succulents

Look for a nice shape, good color, no insects, and no dead or soggy leaves.

To prevent making a mess when you water the plant.

I learned about the knowledge related to succulent cultivation and planted a succulent plant by myself

1
When planting succulents, choose a container with drainage so water can escape and not cause the plant to rot.
2
Succulents need a soil that is lighter, faster draining, and has more aeration than regular potting soil.
3
When watering succulents, allow the soil to dry between waterings, and make sure there is no excess water collecting in the saucer.