These are not usually grown from seed, because of genetic variability (the plants are usually grown for specific variegation patterns). When propagated by leaf cuttings, the variegation is not retained. That's why people usually propagate by division. But you can grow them from seed. It's not extremely hard.
- Soil: Use a sandy, free draining cactus mix
- Water: Just enough to keep the soil from drying completely, Not wet.
- Temperature: between 75 and 80 degrees Fahrenheit is ideal.
- Light: Bright indirect light Around 500-800 lux) until the plant reaches the 3 leaf stage. You don't need much light right as the seed germinates, as that can cause drying.
- Fertilizer: None, until the plant reaches the 3 leaf stage. at that point, it should be done drawing energy from the seed, and is relying on nutrients from the growing medium.