"And B & W film tends to be slower with tungsten sources."
Boy is that an outdated fact. The difference today is so minimal as to be a non-factor.
Use the light you have. bounce it off the ceiling and or walls. Add fill light with ordinary house lamps, probably with shades removed. All photographs do not need to be made at 1/125 @f16!
1/25 @f4 or f5.6 makes lovely portraits. With adults, I often have exposures of 1/2@f4 on 8x10 or 7x17" film.