This is a frequently asked question. It may not be supported in every country, therefore, I will offer two ways.
How does it work?
Here's what I know though.
1. You have a wallet which is basically an account, but you don't sign up for it. It's like a file that you are meant to keep secure (this is more advanced though, there are sites where you can just register & you're good).
2. Your wallet has a list of sending and receiving addresses (e.g 16EoDzXqajrkvUKWY1GgEQZ3ze83CYQ2Db)
3. For sending bitcoins you need a receiving address from the person that you want to send to. This basically means, you enter Rehasher address which is (16EoDzXqajrkvUKWY1GgEQZ3ze83CYQ2Db) and you fill the amount then send.
Here's how it looks to send bitcoins.
How do I see the Bitcoin and USD exchange rates?
Remember, you're not sending 1 bitcoin because that's too much...
Visit www.preev.com. It will help you convert $5 donation to bitcoin.
Whatever the value was at the time of donation will be what you get in coins.
How to buy bitcoin?
LocalBitcoins
Visit www.localbitcoins.com.
I do not know how to use the website, but I am going to assume this.
Find a guy with very positive feedback and is near your location. And I guess, meet up?
CoinBase
This is probably the best option, but is limited to many countries.
It will automatically create your wallet + secure it. You can buy bitcoins and send them very easily with this.
Visit www.coinbase.com.
Here's how it looks to send bitcoins on coinbase.
Rehasher bitcoin address?
Reply below if anyone has other information regarding Bitcoin.