Type of pot for Phalaenopsis

[LKint]

I've visited two great orchid shows [D.C. and NY Botanical] plus my son's blooming pink Phal intrigued me. Yesterday I felt sorry for and bought a "supermarket" phal [my first orchid] with a 24 inch spike and no blooms [all finished?] in a 6 inch tall, 4 1/2 inch wide ceramic pot wih no drainage hole. It is in sphagnum moss and has 5 stiff healthy leaves [but with bumpy, not smooth surfaces].

Four roots are visible going down into the sphagnum, and one 9 inch root is out of the pot. Should that be cut off? Or while still still attached should that root be placed in it's own pot to make a new plant?

I've placed the phal behind a filmy curtain at the west edge of a south window. House thermostat is 68 degF days and 64 nights. The hot air heating includes humidification.

Should I keep ithe phal in the non-drained pot? Should I re-pot immediately? Should I wait until the plant gets accustomed to my house environment before repotting? What pot size and material? Thanks in advance!