Name your publishing company. There are no rules about naming a publishing company. You can use your name or something religious to indicate the nature of songs you publish. If you are planning to turn your publishing company into a business, you should do some research to ensure there are no other publishing companies using the name you select. To avoid this, try to personalize your publishing company as best as you can. This is where including your name in the name of the company can be a benefit. Whether you turn this into a business or not, creating a publishing company name can help identify your music.
Transfer your written hymn--music and lyrics--to professional printed sheet music. You can do this using notation software. Notation software is easy to use. It allows you to drag and drop notes, name instrument parts and type lyrics onto sheet music for publication. Many hymns are typically piano/vocal arrangements suitable for church hymnals. Creating this type of sheet music with music notation software is relatively easy. There are many notation products on the market, including free options.
Print your sheet music hymns. To publish means to make available to the public in some form. A good way to publish hymns is to visit churches and ask them to take a look at your work. If you get choirs at church to perform some of your music free and it goes over well, this could open markets for your self-published hymns.