I have a seedling dowiana aurea. I received it last year instead of my C. schroederae so it was a bit of a surprise (the vendor sent me the schroederae after I called and I ended up with the dowiana, too.). I did quite a bit of research before touching it because I have heard that they can be difficult. Chadwick and Son's has a great article on how to care for it.
Here is what I have learned/done. They don't like being repotted in the off season but I had no choice as it was in bark and in my home, bark = death. What I did was to carefully extract it from its pot and gently shake off as much medium as I could, being very careful not to damage the roots in any way. Then I set it on top of some lava rock in a plastic vanda basket. I took a rock or two and gently set them to anchor the orchid. Most of the roots were left exposed. No problem...the roots easily absorb water and quickly turn green. They prefer to be drier in cooler temps. They grow at the top of the forest canopy and so they need a great deal of light. I have this in a prime spot. They don't like to have any fertilizer at all during the rest period or they tend to self-destruct. My temperatures are a little cool for their liking so the growth slows. I don't fertilize. Last spring I added eggshells so the cattleya should be getting a nice source of calcium now from the decomposing eggshells. Calcium doesn't hurt.
Just read through the Chadwick and Son's article and you will be fine.