A collection of sources
1. Explanation of the Divine Liturgy (Bishop Vissarion Nechayev)
https://azbyka.ru/otechnik/Vissarion_Nechaev/ob-jasnenie-bozhestvennoj-liturgii/
2. Homilies about the Divine Liturgy (St Seraphim Zvezdinsky)
https://azbyka.ru/otechnik/Serafim_Zvezdinskij/propovedi-o-bozhestvennoj-liturgii/
3. Explanation of the Divine Liturgy (St Nicholas Cabasilas)
https://azbyka.ru/otechnik/Nikolaj_Kavasila/Izjasnenie_bogestvennoj_liturgii/
4. Reflections on the Divine Liturgy (Nikolai Gogol)
https://azbyka.ru/razmyshleniya-o-bozhestvennoj-liturgii
5. Mystagogy (St Maximus the Confessor)
https://azbyka.ru/otechnik/Maksim_Ispovednik/mistagogiya/
6. The Wisdom of Our Salvation (On the Sacred Rites and Sacraments of the Church) - St Symeon of Thessaloniki
https://azbyka.ru/otechnik/Simeon_Solunskij/premudrost_nashego_spaseniia/
To translate the books into your preferred language use google translator.