If you're looking for sheet music or lyrics for Christian hymns, check out Hymnary.org
Here's some information about Hymnary, copied from the "About Us" page on their website:
"Do you search for hymns and worship music for worship services? Are you researching a particular hymn? Looking for an arrangement or media file? If so, Hymnary.org is for you. Hymnary.org is an online hymn and worship music database for worship leaders, hymnologists, and amateur hymn lovers alike. At Hymnary.org you can search or browse hymns by title, tune, meter, key, scripture reference, and more.
"In partnership with The Hymn Society in the United States and Canada, Hymnary.org now houses the Dictionary of North American Hymnology -- making Hymnary.org the most complete database of North American hymnody on the planet."
(Source for quote: https://hymnary.org/about)