Some of you may have joked at some point that "money grows on trees" or you might have wished you had a money tree but what if I said "that is possible" and that you just need computing power to do it? Yep, You can indeed make some extra change by selling computing power known as "hashrate" however if you wish to make a decent return you need to have the proper hardware to drive these high hashrates, You will also need to know the right cryptocurrency to mine for your hardware.
For Newbies you can just wait out the storm known as the Cryptocurrency craze in the GPU market environment and buy a RX 480 /580 or even a GTX 1060 / 1070 in order to produce a decent hashrate and ROI (Return On Investment). All you need to do is simply download the Nice Hash 2 application, Wait for it to set up, Benchmark then mine away. I will advise an AMD RX 480 / 580 or GTX 1070 if you wish to game (you'll have to reduce your graphical settings though to maintain frame rates) while you mine your cryptocurrency but it might slightly reduce your hashrate while you do that. You'll also need to set up a wallet which you can use Nicehash's wallet by registering here, Verifying the confirmation e-mail and then log-in, copy / paste the wallet link into your Nice Hash 2 application.
For more info including the time it will require to get a ROI (Return On Investment) for your Graphics Card you can refer to NiceHash's Mining Calculator.