Your choice is right, it almost can't mining a bitcoin now for person.

To buy bitcoins, note that you do not buy bitcoins on any Changers like coinbase, okpay, payza and etc, where will make you lose a lot of costs needlessly.

You should choose a bitcoin exchange, where to find exchange? look this https://bitcointalk.org/index.php?topic=695082.0

I suggest you can try LakeBTC, just meet its price is in the low according to Coindesk BPI (the bule line ): http://www.coindesk.com/price/


There is only 3 steps to buy cheapest bitcons, you can see https://www.lakebtc.com/s/buy-bitcoins

but you have to know how to use Bitcoin wallet before your bitcoin tour, see this https://bitcoin.org/en/choose-your-wallet


p.s more simple questions about bitcoin you can see https://bitcoin.org/en/faq