How on earth do i transfer music from itunes to my iPhone?

I recently updated my iTunes and now can't transfer the music to my iPhone. It doesn't even give me an option to go into my phone and click like summary music and stuff like that. The older iTunes was a breeze but i can't understand this new one and I feel like pulling out my hair!

Plug your phone into your computer, open up iTunes and sync them. Everything in iTunes will sync to your phone and you will be able to use it then.