I don’t encourage succulent collectors to grow ”rock grows flowers”, aka 石生花, lithops from seeds, especially in Malaysia. If you are from other seasonal country then it’s definitely worth a try! The climate here in Malaysia is simply too hot for the lithop seedlings to grow. I grew mine, they germinated but they didn’t survive long :( all of them died.
Anyway, if you have bought the seeds, here is a link i think is useful!
What I know is, most succulent seedlings should be grown in a closed environment, with the soil kept damp (but not drowning them!).
1. Get a plastic container, make about 10 holes at its bottom, then include some loose soil (just soil will do).
2. Wrap the container with plastic wrap and poke holes on it as well.
3. Put them under shade and not directly under the sunlight.
4. Make sure you keep the soil damp everyday :D
That’s all i know, good luck!