Hello, So I've seen alot of people talking about how they want to start mining but don't have a free system or money to make a rig...
Just use your current computer and mine freely....
One of the easiest ways to do this is with minergate http://minergate.com
All you do is download the program, Go to the smart miner tab, And press start mining whenever your away at work or school and bang some easy crypto.
Now this won't make you rich. But it is some for lite playing with or just testing.