Foshie

I have a 2009 Lincoln MKZ and smoke has been coming from the driver side of the engine. I suspect the power steering pressure line. Filled up the reservoir to the line and in 12 miles it was extremely low again. When I turn the steering wheel that is when the white smoke starts. There is fluid all over the firewall especially on the driver side. Has anyone replaced this? Is it a at home repair or bring to a shop?