how do I put my music in the cloud from iphone

You can't upload your own music (e.g. copied from CDs) to the cloud on your phone, you can only do that via your computer's iTunes (and if you've subscribed to iTunes Match).

For iTunes store purchases you can delete it from the Music app (e.g. by swiping/dragging from right-to-left across it in the app), but whether it will then show in the cloud for redownloading depends upon what country that you are in, if it's still in the store, and if you've moved countries since buying it. If you've subscribed to iTunes Match and it's been matched, it should show in the cloud.