One excellent resource is the – a choir book containing the Cherubic Hymn, the Creed, and the Our Father in four-part harmony.
Create a mobile-responsive "Reader Mode" for the PDF that uses high-contrast settings (white text on a black background) and large, simple fonts to ensure it is readable in the dimmed lighting of a church. Liturgy of St. John Chrysostom 1 liturgija sv jovana zlatoustog pdf link
Yes. Many Serbian PDFs are printed in a bilingual format: Church Slavonic on the left side, Modern Serbian on the right side. This is ideal for beginners. One excellent resource is the – a choir