Hi maru!!
Welcome
I have almost the identical seedling lol. I got mine for like $5 at the ft lauderdale orchid show too funny I bet it was the same vendor as the tag and pot are the same. I’ll post up a few pix of mine tomorrow but I just swapped out the moss for hydroton (Leca) and raised the build up about an inch. They had it so low I could not see any of the bottom and i like to see the new growth right away. When I took it out mine had three really decent roots of about 1.5 inches
Anyhoo. Fast forward a week and there is a little green pimple on the bottom and the game begins
I see about three pinhead new roots which is very encouraging and I am planning to mist the leca once of twice a week but leave it alone until the new growth is the size of the current bulb
We live in special climates (you more than I) where we can get away with a lot of help from ma nature
If you place that bad boy in some lava rock and perlite or other inorganic media, you could probably water it freely without damage as lone as you have good air movement(grow it out doors)
I don’t know if you have ever seen this plant bloom in person but you might start to like black flowers in a few years