No crank no start with a burning smell under the hood

Clearly you have a major malfunction, so nothing about it will be 'typical,' like that caused by a part nearing the end of its service life. Most likely you had a short, it most likely won't be hard to find given the severity of your description. First thing to di is remove the battery, hopefully it wasn't shorted and ruined. You can check the battery and other wiring harnesses visually but you'll want to use a multimeter to check the rest thoroughly.

In these situations i prefer to follow my nose. Find the spot the smell is the worest and you will find your trouble area. alternativly look for signs of burnt or melted plastic or wires.