There is some great information over on the Orchid Forum at the top of the page:
https://garden.org/forums/view...
But, to get you started, what is your orchid planted in? If its moss, you will have to be extremely cautious with the water. I have several Phalaenopsis planted in moss and they do great. But, don't water until you can't feel any moisture in the hole in the bottom of the pot (the pot will feel light). Then water by soaking the whole pot in a cup or something for a few minutes to allow the moss to rehydrate.
If your Phal. is in bark, look through the sides of the pot for moisture. If you don't see any, water. Otherwise, don't. Phalaenopsis do better on the drier side.
For your Phal. and all the other plants you have gotten, don't repot, don't fertilize. The pots they came in are fine and they don't need fertilizer in the winter. When you do fertilize (when you see new growth next spring), use the fertilizer at 1/4 to 1/2 the recommended strength (depending upon how often you fertilize). Fertilizer is highly overrated and plants just don't need as much as the fertilizer manufacturers would lead you to believe.
Phal. need bright light but no direct sun. I don't know what your other plants are so can't advise you on their light needs.