Heating a all brick house

Hi I bought an 5,500 sf triple brick walled old school house built in 1905 I find a lot of pros and cons on insulating the interior walls I currently have the interior walls framed out and I’m still not sure on if I should and how to insulate the walls would a raidiant barrier/foil bubble wrap work instead of using foam insulation I’m using a gas furnace and live in north West Indiana the winters can be below zero at times
There is no damage to the brick what so ever inside or out