Sarcochilus (ceciliae) care

[neophyte]

I was reading about the care this particular species requires. Most websites seem to recommend scoria/bark; would sphagnum work? I ask mainly because sphagnum has historically worked well for most of my plants, so I haven't ventured much into other media. Also, apparently the species prefers to have its roots sit on top of the medium? Is this a tricky species/are there easier members of its genus that I might start out with?