Phalaenopsis

This is a beautiful colour. I`m ashamed to say that I am just hopeless when it comes to indoor plants.

beautiful Orchid...

Help cannot get my head round how to care for this.
All the buds had dropped off so I stopped watering it then I sprayed the roots with rain water it was such a fine mist so I also sprayed the flowers within days they had shriveled up and now its a bare stem.
What should I do? the stems seem to have little hints of buds should I leave it be or prune it back? Any help gratefully received! as I am not into house plants (only have one other plant indoors) but it was a gift.