The real skill of reading a datasheet is being able to sift through something as dense as a controller datasheet. The sort of thing that details the operation of microcontrollers, processors, LCD devices and sensors. A lot of information about how to get started with, or how to implement is contained within these documents. Microcontrollers and processors will often have example code, or something close to, specific to various components of the device. LCD controllers will have timing information for how to communicate with the device and what output that will result in. Sensor datasheets will often have formulas for calculating real life units from data, and what will produce certain output.
Datasheets are a powerful tool, but it takes patience to realize their true potential.