For most people electrical work is something that electrician’s do and that is probably a good idea. However it really isn’t as hard as it seems.
Here’s a plastic electrical box that has a yellow line coming out. As a side note wire that is yellow can have a 15 or 20 amp breaker at the panel box. White wire can only have a 15 amp breakers as the line isn’t capable of handling a 20 load. This particular outlet is for a refrigerator and is called a “dedicated line” meaning that the only load on it will be from the refrigerator.
Next the wire is stripped and in this case the ends are bent to be applied to the receptacle.
Attaching the electric lines
Wires are attached and just apply the screws to hold it into the box.
Now to the panel box and a wire clamp is attached to the panel and the wire is passed through that and secured.
Attaching the ground and white neutral line to the panel.
The black line, which is always a hot line, is attached to the terminal on the breaker.
Pop the breaker into the slot and done- power!
Again running electrical lines isn’t all the hard but I wouldn’t suggest that you even attempt it. Hire an electrician and make sure it gets done correctly and safely.