Dendrobium Micro Chip Questions on Repotting

[Plantcrazed101]

So this is my first Dendrobium, Dendrobium 'Micro Chip' that arrived in the mail a week or so ago. I'm not sure how to tell if it's in good condition...what do y'all think?

Some of the pseudobulbs look wrinkled, and I'm not sure if that's expected on a Dendrobium or if it's a sign that it didn't get enough water.

I put it in a solo cup that I drilled holes in the bottom and sides for ventilation, with fine grade bark and small lava rock...is that okay? How much moisture do you think it likes with that type of mix?

The roots in the solo cup are snug but there's a tiny bit of room for them to grow. Hope that's okay.

Also, do the Pseudobulbs need to be above the soil as with other orchids or deeper in the mix?

Then lastly, the temperature got down to about 55 on my windowsill, is that okay for it, or is that too cold? Since this isn't a Dendrobium that typically needs cold temperatures, I'm not sure if it needs to be grown warm to be healthy or it can handle a little coolness.