You could check at your local nursery to see what they offer at this time of year as far as shade plants. Maybe begonias. Not sure about cyclamen; they might need some sun. Maybe impatiens.

As for your office, houseplants which do well in low light might work for that space. You could ask on the house plant forum for suggestions. Pothos seem to do well anywhere. I think having plants in the office, especially one without windows, is a great thing to do.

I don't grow these kinds of flowers but my parents have a very large covered deck and they grow impatiens, begonias, ferns, hostas and geraniums. Of course most of them are grown either hanging at the edge of the roof or on tables or shelves which sit 'near' the edge of the deck so they 'do' get some indirect sunlight but those are a few you could try. If you don't have tables or shelving don't spend a lot of money... have fun at yard sales, second hand stores and antique shops to see if you can find a good bargain that you can spray paint to your liking.

Barb

This time of the year we are very limited with options for shade,but you will find English Primroses,Cyclamen,and Violas.Mix these with colorful leaved ivy for your planter box and they will fill out nicely.
When Spring arrives you will have many other options,including Torenias,Impatiens,Coleus,and Begonias.

For the office, your best bet will be pothos as suggested, aglaonemas (aglos), and snake plant (sansevaria/mother in laws tongue)