I plan to keep the fern next to a large (but yes frosted) window, I think it is 5x5, with north light - so no direct sun except for a short time in the summer. There is also a side window that faces east and is 2x3-ish with clear glass. That window is at the back of an alcove which I will likely use for a plant of some type, so not sure how helpful it might be to the rest of the room.
Hadn't thought of the humidity, and you are very correct that the room is only steamy for a short period each day - I don't take long showers. I also have rather pathetic luck with houseplants, which is one reason I was thinking of using plants native to my area rather than tropicals.
Thank you for your suggestions, I'll do some research on them.
