Adding to the number of resources provided on this site, we are excited to officially launch the Liturgical Infrastructure page, providing resources and reference material for those involved with the operational functionality of liturgies — namely, singers, servers, and priests.
If you're interested in:
Learning how to sing and effectively practice Gregorian chant
Learning how to altar serve
Learning how to offer the Traditional Latin Mass as a priest
...please feel free to avail yourselves of these materials, share them with anyone you think would find helpful, and/or provide any suggested additions.