Hi Judy, here is some information about indoor fire pits. You must have good ventilation or the fire will take all the oxygen out of the room. Be safe. Safe Indoor Fire Pit - Stay Warm! - YouTube
Feb 11, 2014 - Uploaded by ThirdforceFilms
Safe Indoor Fire Pit in Case the Lights Go Out Build a small indoor safe fire-pit just in case you're stuck ...
I would be very concerned about safety.
Simply not a good idea there are reasonable price electric heaters that look like a wood stove I have one and I use to take the chill out the house first thing in the morning. If you are adamant in going forth with project, you must install a carbon monoxide detector, also make sure you have a good home insurance policy and if you have pets be extra careful. My thoughts simply not a good safe idea