Except in reality 99% of people will just take the example (or auto-generated) linker scripts from the MCU manufacturer without understanding a thing about them and call it a day.
This worked fine for me for a little while, until I needed to do things that the manufacturer's example script didn't do, such as place certain globals into specific sections of memory. I had to piece the syntax of the linker file together myself, which wasn't too difficult, but a straightforward introduction to the file format would have been appreciated.