Paph seed sowing

[Chococatte]

I plan on trying my hand at orchid seed germination with a few orchid species seed in mind in a few weeks. Anyone with experience sowing Paph bellatulum, Paph. vietnamense, Paph nivenum, and few other Paph sp, could they advise me on the medium requirement these seeds grow on, light and/or darkness requirements for mother flask? And any other information they willing to share about these species is greatly appreciate. Thanks in advance.