How to transfer music from itunes to my iphone?

I need step by step process please.
EASY 10 POINTS!

i'm a computer dumbhas, so i need some help figuring this out.please. Cherry on top!

Well, There's A VERY Complicated way to do it, Or you Have the Easy Way: D ( I Prefer xD ) Just go on the App Store, find a music Downloader and get any song you want, and its better because It Weirdly Doesn't take up space on your phone! Hope I Helped!