I have been praying the Liturgy of the Hours regularly since 1994. I have also been a novice in two different religious orders between 1994 and now (I’m not currently in religious life or seminary). I hope I can shed some light on how to pray the Divine Office.
There is a difference with Daytime Prayer between the one volume and four volume sets. The one volume set only uses the Week I Psalter for Daytime Prayer. It also always uses the antiphons, readings, responsory, and concluding prayer from Ordinary Time.
Cue is correct about how to pray Daytime Prayer. I will fill in what he didn’t cover.
Daytime Prayer during Ordinary Time consists of three Psalms with an antiphon before and after each Psalm. It also has a concluding prayer specifically for each hour. This is what you have been praying when using the one volume set.
Advent, Christmas, Lent, and Easter have a different format. There is only one antiphon instead of three and it is said before the first Psalm and after the third Psalm. The concluding prayer is taken from the proper of the day. Today you would say the prayer from Thursday in the Second Week of Easter. However, when there is a saint’s feast day, as there will be on Saturday for St. Anselm, you will still take the prayer from the proper of the day. Office of Readings and Morning Prayer you will say the prayer for the feast of St. Anselm. Daytime Prayer you will say the prayer from Saturday in the Second Week of Easter. Evening Prayer would also use the prayer from the saint’s feast day if it didn’t fall on a Saturday.
Monday is the feast of St. George. This means you will say the prayer for St. George after Office of Readings, Morning Prayer, and Evening Prayer. You will say the prayer for the Monday in the Third Week of Easter for Daytime Prayer.
A brief overview of Daytime Prayer goes as the following:
Opening: O God come to my assistance; O Lord make haste to help me. Glory be to the Father… alleluia.
Antiphon (during Easter season it’s always Alleluia, Alleluia, Alleluia).
Psalmody (three Psalms followed by the Glory be after each Psalm)
Dismissal (always Let us praise the Lord and give Him thanks if saying the office by yourself or in a group without a deacon, priest, or bishop present)
Night Prayer follows a similar format to Daytime Prayer during the Easter Season. Sunday Night Prayer I (said on Saturday) and Wednesday Night Prayer the antiphon of Alleluia, Alleluia, Alleluia is said before the first Psalm and after the second Psalm. It is not said in between the first and second Psalm.
It takes a while to get comfortable praying the Liturgy of the Hours. The important thing to remember is that you are praying the official prayer of Holy Mother Church. Our Lord is pleased you are making the effort even if you make mistakes. Keep perservering and don’t worry if you are saying it correctly or not. You will get the hang of it in no time.