Bitcoin mining

I have no idea about what bitcoin is or what it does besides encrypted money and I like the idea of leaving my computer on for free money so.. where do I start mining bitcoins are what do I need to do?

This day in age bitcoin mining isn't worth it anymore. The reason is that you end up spending more money and a good computer and your power bills than what you actually make.
Linus Tech Tips did a video on Bitcoin Recently, I recommend you checking it out.

https://www.youtube.com/watch?v=AE8tATPge7o

In the video, it shows GPU mining which is practically the same thing.

Yeah.. I'm pretty sure I don't have the money to do that haha.