If you are new to the Traditional Latin Mass, don't feel out of place. If you are of a Catholic of the Roman Rite, this is still your Mass. While you may be unfamiliar with the language, some of the customs, and parts of the order of the Mass, this Mass, its richness in reverence and mystery, are part of your spiritual inheritance from the Church.
The celebration of the Traditional Mass is not nostalgia, nor is it some relic of a bygone time, visited as a museum piece by the curious or the tourist. Here is a deep spirituality connecting us to the deep roots of our Christian faith, while simultaneously alive and lived to the full. The eternal truths revealed to the Church made present by outward sign for all of us--as it always has been. The need for this mystery and grace is much needed now, perhaps more than ever.
When you decide to attend the Traditional Mass for the first time, here are some pointers that may be useful.
In many churches that offer the Traditional Mass you will find small red booklets designed to help you follow along. These can be helpful at times. In some ways, however, the booklets may simply distract you from the Mass and interfere with your prayer. There is a lot of silence and time for prayer at in the Extraordinary Form of the Mass. For some following along seems to help, for others simply accepting that they may not understand or catch everything and delving into prayer and uniting themselves by that prayer to Christ at Calvary allows them to appreciate the Mass more fully.
As far as gestures go, kneeling, sitting, and standing can be copied from those around you. Even if you miss a cue, don't worry. There are no rubrics governing the actions of the congregation. So long as you are praying, you're doing it right.
Finally, Holy Communion in the Traditional Mass is always received kneeling at the altar rail and on the tongue. The priest says the entirety of the prayer which is translated, "May the Body of Our Lord Jesus Christ keep safe your soul into life eternal. Amen." The priest says the "Amen" so all you need to do is tilt your head back slightly and stick out your tongue slightly and receive Our Lord. After receiving Holy Communion, please, feel free to take a moment to pray at the altar rail with Our Lord, before getting up to make room for the next person.