If you want to get started on bitcoin mining I can recommend trying out CEX.IO. It’s both a BitCoin crypto exchange where you can buy and sell crypto coins (not only bitcoin). But you can also trade in mining capacity (GH/s). The price of GHS on CEX.IO is resonable and cheaper than for example cloudhashing.com. The great thing about buying GHS is that it’s constantly mining for you while you are trading. What ever your GH/s balance will be sitting there mining bitcoins until you sell them.
Have a look:
