You do need to be eligible for this program, meaning that you need to have 2,000 or more followers on your Facebook page as well as having reached over 300 concurrent viewers in a live video recently. If you do qualify, you can put in live ad breaks in your video by clicking the $ icon on your feed. If you do get the ability to join the monetization program, be sure to carefully read through the content guidelines and community standards. This will ensure that you are in compliance so that you will not run into any issues with your account.
A program like CD Baby is one where you turn to them to help you monetize your music. These programs, which you pay for, allow you to earn revenue for publishing your music.
You can get royalties when you use these programs through YouTube plays, international downloads, global streaming activities, and numerous other activities. This can be a good option if you are just starting out and have the ability to become a paying client of these companies.