Sorry bro, but looking for free bitcoins is liking looking for some free money online. There is no free bitcoin. Either you work and get paid in bitcoins or you exchange ghana cedis for bitcoins. If you need bitcoins to do online purchasing, all you need is to exchange our normal currency for the bitcoin at the exchange rate.
currently for 0.01 bitcoins, you need 3cedis and 20pesewas so that is the exchange rate.
you can buy bitcoins with ghana cedis here http://www.cbtekghana.com/ecurrency/