Doors and Windows - metal framed windows to french doors

I found an original set of french doors that match the 50s era of my house down to having the same copper and brass door knobs.

The house has exterior metal framing instead of wood. I want to replace a conjoined pair of double hung wood sash windows with the french doors.

Has anyone dealt with exterior metal framing? Can it be altered, replaced with wood, replaced with a new metal door opening???..

I'm a pretty handy lady and I've never created a rough opening or dealt with metal framing. I have installed prehung doors in existing openings and doors in existing doorways.

The windows are 60.5" wide and 84" (7' ) form the floor to the top of the window...not the trim.
The two doors have different widths and both are hinged, 30 5/8" and 29 1/8" = 59.5" wide, by 91" (7' 6") tall. 5" shorter than the windows.

There are some other issues, like electric wires under the baseboard and a heater vent below the windows. I think the metal framing needs to be addressed first.

Thanks for any and all assistance, thoughts, sources for info, etc. :-)

Warmly Yours,
Joyce (sagoKC)