What to repot Oncidium(?) from Trader Joes in

[Zyzzyzus]

Hello,

I have a few micro mini orchids growing in a terrarium and they're doing ok thus far but I've been wanting to try a 'full sized' orchid for awhile. I found this one at Trader Joes today. It looks like it's potted in plain potting soil. There are a couple of healthy green root tips visible poking out of the bottom of the pot. It's in a plastic pot with a few small drainage holes on the bottom, and the plastic pot is in a plain ceramic pot with no drainage holes. I know it needs a better pot, or perhaps it needs to be mounted? But what should I pot it in, medium wise? I have some sphagnum moss already because i used it when mounting in my terrarium, but should I use bark instead? If so, what kind of bark? Do oncidiums do well mounted? Is this even an Oncidium?

Thanks!

edited to add: I know it's impossible to ID a NOID for sure, but if it helps anybody narrow it down/guess the flowers are more mauve and purple and pink, not maroon and red like the pictures make it seem.