If you’re curious, the Church has committed it’s teaching and doctrine in writing. Here is a link to the catechism:
usccb.org/beliefs-and-teachings/what-we-believe/catechism/catechism-of-the-catholic-church/epub/index.cfm
A clarification on revelation. It is God revealing himself to man and those thing necessary for salvation. Christ revealed everything necessary for our salvation, public revelation ended with the death of the last apostle- the last folks to be able to witness to Christ’s revelation directly.
67 Throughout the ages, there have been so-called “private” revelations, some of which have been recognized by the authority of the Church. They do not belong, however, to the deposit of faith. It is not their role to improve or complete Christ’s definitive Revelation, but to help live more fully by it in a certain period of history. Guided by the magisterium of the Church, the sensus fidelium knows how to discern and welcome in these revelations whatever constitutes an authentic call of Christ or his saints to the Church. (84, 93)Christian faith cannot accept “revelations” that claim to surpass or correct
the Revelation of which Christ is the fulfillment, as is the case in certain non-Christian religions and also in certain recent sects which base themselves on such “revelations.”
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73 God has revealed himself fully by sending his own Son, in whom he has established his covenant for ever. The Son is his Father’s definitive Word; so there will be no further Revelation after him.
The Bible itself nowhere claims to be all that is necessary, neither does it claim to be some sort of textbook that contains the entirety of what the Apostles taught. The Apostles taught as Jesus did- by their word and example while living amongst the people. The apostles wrote letters to encourage the people after moving on to another community.
John 21, 25
There are also many other things that Jesus did, but if these were to be described individually, I do not think the whole world would contain the books that would be written.
2 Thessalonians, 2 15
Therefore, brothers, stand firm and hold fast to the traditions that you were taught, either by an oral statement or by a letter of ours.*
Paul taught that we are one body in Christ, that we rejoice or sorrow over the status of any part of that body. Those portions on Earth as well as those who are with God. Since we are united together as one body we can ask for and receive assistance, we can support each other.
Revelation 8 indicates the prayers of the saints or the Holy Ones are presented to God, why not ask Mary to pray for us just as we ask others to?