Hey there, Aino.
If you want to quote multiple people, you can hit the "MQ" (stands for Multi-Quote) button at the bottom right of the post, near the "Quote" button. You can finish that process one of two ways: 1) for the last person that you'e quoting, hit "Quote", and you'll go right to the response box with all the quotes there; 2) after you "MQ" as many people that you want, hit "Reply" and you'll go to the response box with all the quotes. I hope that helps.
As to your question, the sacramental life of the church is the life of the church. For us, the Kingdom of God has begun to be manifest through the church. For now that is an incomplete reality, but Christ reigns in our hearts. After He returns, all creation will be united to Him, just as we are, and filled with God's presence. In the meantime, we are given a foretaste of that reality, and participate in it to a degree. That is especially true in the Eucharist. In it, we participate with Christ in the transfigured reality of creation. It's not just that we're "eating Jesus", but that we are experiencing the reality of the New Heavens and New Earth and the profound unity that it, and we, have with Christ.
We don't have a list of sacraments, but we'll use the Catholic list for the sake of discussion. That list would be Baptism (participating with and being united to Christ's death and resurrection), Chrismation (being sealed with the gift of the Holy Spirit), the Eucharist, Marriage (becoming one flesh, and together growing into being more one flesh with Christ), Holy Orders (where those ordained participate with Christ in a unique way to fulfill His ministry that He began), Unction (where creation participates with God in our healing), and Confession/Reconciliation (where we participate with the bishop/presbyter and with Christ in being healed from the effects of sin in our lives). In reality, any and every way in which the life of God and His saving/transforming power is manifest in and/or through the church is experiencing the nature of "sacrament". For example, as Christ taught us, if I feed someone who is hungry, I am feeding Christ. That is an example of the life of God breaking through creation.
The Liturgy is but one of many services that the church has, albeit the most significant one. The daily cycle of services consists of several times throughout the day when we engage various prayers, making heavy use of the Psalms. Most lay people don't have time for all of them. Monks, on the other hand, tend to participate in most/all of them. However, that cycle is meant to cultivate continual prayer in our hearts. So even if we can't engage all o the prayers and services, the goal is that we always be praying.
Our Liturgies don't have a specific time set apart for a sermon. It is most common, however, to have a sermon directly after the Gospel reading. Some have it at the end of the Liturgy. Most monasteries don't have sermons in their liturgies. But even if there were no sermons, the Liturgy and services are packed with teaching (if we pay attention) and are catechetical in nature.
I hope that answers your questions.