how to add music/video from my macbook to iPhone music?

Hello,

Hope you are doing well.

I have bought my new iPhone 4 and can't add any music. I also dont know how to add music. Before that, I used to use Android. It was so easy to do. But here I cant find anything? Could you please tell me how can I add music/video from my macbook to iPhone music/ video?

I searched online about this matter but everywhere I found that, I have to add music to itunes at first. I even dont know how to do it. Please help me with the whole process.

*another thing, is there any way to add music to 'iPhone Music' from my whatsapp ?

Thanks for your help.

I wish you good luck and have a great day...