No need to speak further let's get into the jailbreak.
1. Download GreenPois0n Absinthe for Both Mac Or Windows. Then extract the file and open it.
2. Then click on Jailbreak button (see the picture). Then wait for about 5 or more minutes for jailbroking process to finish (see the loading bar). And then your device will reboot once complete.
3. Once it rebooted, Absinthe icon will appear on your device's screen.
That means your device is jailboken now. Now it's time to launch Cydia using Wifi connection on your device. If you get error or delay when trying to access Cydia, don't worry it's simply because a huge traffic the app store receives. Just keep trying.