Is my miniature orchid still alive?

[absolutebeginner]

First of all, I'm new here! Hello everyone and thank you for providing such a helpful forum!

So in early summer, I bough two mini orchids (Miniature Phalaenopsis I believe) in a supermarket. It was a total impulse buy, and I have had zero knowledge caring for flowers, but I am determined to take good care of these pretty little plants! It seemed healthy and happy:


In august, all the flowers have fell off the stem. I understood that it was all natural. However, the stem was also withered:


I read somewhere that I'm supposed to cut at the nod and it will regrow. What happens if the entire stem is withered? Is it bad? I cut the stem off. Now the plant looks like:


I see new root grown out, as seen in the above photo. So I believe the plant is alive.

Please forgive my ignorance. Could someone please let me know if what happened was normal? Will it bloom again? and how should I care for it going forward?

Thank you thank you thank you!!!!!!!!!!!!!!