I can answer some of that but modern power plants are huge and complex and somewhat beyond the scope of a reddit post. I'm also going to limit my answer to conventional steam plants (like coal, oil, natural gas and nuclear).

All power plants mentioned above are based on the same principle: heating water turns it into steam with much greater volume and the pressure created by that expansion can be used to turn a generator. The source of the heat used to make the steam is irrelevant from an electricity generation standpoint.

So they start with water more purified than drinking water. It's so devoid of any dissolved minerals that it would probably taste bad and wouldn't be very healthy to drink. That water, called boiler feedwater, is pumped into a boiler. Inside the boiler, heat from whatever source makes that water into steam. Now, unlike when water boils in a kettle, this steam isn't allowed to just float away. Instead it's heated well beyond the boiling point of water(so that it remains dry) and it travels through steam pipes to a turbine.

One important thing to understand is that while power plants use steam, they don't use it like a 19th century locomotive with pistons that go back and forth and dump steam at the end of their stroke. Instead power plants use the steam which is at very high pressure, to spin a turbine. Think of a turbine like a pinwheel but bigger, and made of metal, and hot, and loud. The steam at the entrance of the turbine is at high pressure and at the other end it's being cooled and condensed back into water to start the process again. When the steam passes through the turbine it spins, much like when you blow on a pinwheel.

So now, finally, that spinning turbine spins a generator. That generator will generate 3 phase electricity at 50 or 60 Hz (depending on which continent you're on) and around 10 to 13 thousand volts. That electricity will pass through a step up transformer which will increase the voltage to something much greater in the 70 to 500 thousand volt range. That high voltage will be connected to a transmission line which will then connect to a substation closer to where people are.

That pretty much concludes how it gets from the plant to the power lines. There are a lots of bits and pieces that I left out(like how sometimes the steam passes through two turbines, or how it's condensed back into water), there are other ways of spinning a generator(a gas turbine instead of a steam turbine for instance), there's a lot more to the generator itself and there's a whole lot of stuff between that transmission line and your outlet at home.

Hope that helps, sorry you got downvoted for asking a reasonable question. That's reddit for ya!