Yes you can buy bitcoin but there are some rules here;
1. Trusted person, as you are newcomer here, difficult to achieve it, therefore you have to use the second choice.
2. Payment method, read this;
https://bitcointalk.org/index.php?topic=14632.0Easier to buy from someone near to you, maybe your family or friend or at least someone in the same country.
Because of security reasons, people tend to buy and sell bitcoin on the exchanger as a trusted company which you have to register (sometimes have to fulfill the KYC policy) and send the money first.