One of the easiest tasks to perform as a homeowner! Here are some sites and a You Tube video for general instruction.
These days every manufacturer has on line instructions, and generally a You Tube to go along with it. Look up your make and model and you will have no problem at all.
The instructions are self explanatory usually 5-6 wires to hook up make sure u have electrical tape to hold wires to wall so that they don’t slide behind the wall
The ones I replaced had the instructions with the device.
The instructions came with the device. Have a partner read off the instructions to you as you do the project.