If you have a lot of attention, which I assume you do:
Put it in a paper towel/toilet paper. Soak it completely and wring it out well. It should be quite damp, but not completely soaked with excess water. Then place the paper towel with the seed between two plates for consistent humidity and darkness. Keep moistening it again if it dries out for any reason; spray bottles work perfectly for that, you can also spray the inside of the plate. Open the towel regularly so the roots don’t grow into the paper towel.
Or
Put it in a glass of water, place it in the dark, and keep an eye on it to make sure the seeds don’t sink. If they do, plant them; otherwise, wait until you have your desired root length.
Then plant it so that the root is in the soil, with the shell or sprout lying on the surface, so to speak, just bury the root. You can do this with a root length of 1cm+; otherwise, it’s really tight, very tight. Max 3mm into the soil, really just cover it. You can add more soil later if you want.