First I would like to get rid of all those preconceived ideas that PC gaming is: Expensive and complicated. These are both untrue and mostly based on facts from the 1900's.
PC Gaming is Expensive
This is a fact commonly thrown around when people first heard the words "Pc Gaming". IF you look at the picture below you can see a modest pc (can play most games at decent frames) Is about $100 more then a console (controllers included).
So if you take your old pc which you most likely use for work and sell it you will end up with a fast work pc and gaming pc.
PC gaming is complicated
This myth comes from the old times of DOS. DOS was basically just words in which you typed to get to places. In this time there was no need for a mouse unless you played games otherwise everything was typed.
Example of a DOS OS (similar to windows cmd)
As you could imagine this was a very boring operating system and also very complicated and also required you to memorize commands. But the bigger complication was that games were required to be installed manually. So you would have to sit there typing out commands to copy files over to your PC. If you made a mistake chances are you wouldn't know until you tried to start the game.
Installing Call of Duty Black Ops through steam
Today PC gaming has come along way. Now we just press next and the hard work is done for us. Now we just click instead of type. Today PC gaming is simple.