St. Anne's live streamed it first Saturday Mass in the Extraordinary Form (which I posted a few posts below this). Prior to that I offered a brief catechesis on this form of the Mass with links to its fixed and changing parts. Here is that brief catechesis:
First Saturday’s Mass will be in the Extraordinary Form. Catholics' actual participation in this Mass differs a bit from the Ordinary Form Vernacular Mass. The older Mass is more “contemplative” and more like “adoration” because so much of it is said in a low voice by the priest. Also, there are few options in the EF Mass and only the Roman Canon is prayed. The only parts that change are the Introit, Collect, Readings, Offertory Antiphon, Secret (Prayer over offerings), Communion Antiphon and Post Communion Prayer. Of course, the priest faces the church’s liturgical east, what some mistakenly think he has his back to the congregation. In fact, the priest is facing the same direction as the laity in prayer and worship and this configures the priest to the laity's posture in this regard as their intercessor (intermediary) before God the Father.
This is a link to the “Fixed Parts” of the Extraordinary Form Mass:
And these are the changing parts for the Feast of May 2nd (which is a First Saturday):