I think you are close. Permit me to use my rosary as an example. I do not NEED to say the rosary to please God or to get to Heaven, however when I say the rosary it helps me to accomplish a deepening of my faith in a few ways:
First, for those 20 minutes, I am focusing on God to the exclusion of the rest of the world. Second, this being a Friday I will meditate on the Sorrowful Mysteries (Agony in the Garden, Scourging, Crowning with Thorns, Carrying the Cross, Crucifixion) and will hopefully recall again that God loves all of us, even me, so much that he came to Earth and allowed himself to be cruelly tortured and killed as an example of that love. Third, by focusing on God this way I am reminded that I am called to try to love others as much as he loved me, and I have to show that love in a real way. (I have teenagers and this is sometimes a trial

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So that’s how I “use” my sacramental rosary “tool” in a good way. Like any tool, it can be misused. If I start to believe that all I do need for Heaven is to work those beads and I stop going to Mass and forgiving others and helping the poor then the rosary has become an impediment to my salvation instead of a help.
One last point. You may see Catholics refer to both big “S” saints and little “s” saints. The big “S” saints like St. Francis or St. Joseph are the ones who are officially canonized and are known to be in Heaven. The little “s” saints are all of us who are part of the body of Christ (a saint is a holy one who leads a life of union with Christ), here on earth, in purgatory or in Heaven. In the same way that was explained previously, Catholics not only ask the big “S” saints for prayer but the rest of the Catholic community as well. Remember, the big “S” saints started out as sinners and little “s” saints like the rest of us.
In that spirit my brother, allow me as a little “s” saint to pray that God leads you in your quest for truth.