A friend recommended to use word press, I have never used word press but I believe there are many available which one should I use? Where can I get it?
Go with wordpress without any doubt. You can get wordpress here. Also find more info about this under blogging sectin. DON.
I've been debating this as well and have been advised by alot of people that it's a great way to help improve rankings by finding like minded people and dropping your like in replies to their comments.