I am an expert in daydreaming

and that’s why I can’t pray the Rosary. But I have been told that one doesn’t need to pray the entire Rosary at a goal for instance. One could spread it out over the entire day or week.
BTW, what is prayer? (We were taught how to pray in yesterday’s Gospel.)
To pray is to talk with God. But about what? About what? About Him, about yourself: joys, sorrows, successes, failures, noble ambitions, daily worries, weaknesses! And acts of thanksgiving and petition: and love and reparation. In a word: to get to know Him and to get to know yourself: ‘to get acquainted!’"
St. J. Escriva, “The Way”, 91.
For those of us with wandering minds, I believe the solution is to
avoid lengthy vocal prayers. Again, prayer is communicating with God. So it mustn’t be lengthy. The Our Father isn’t lengthy. I once heard a priest say that, for those who are too busy to pray, it suffices to pray the Our Father a day.
BTW, before praying, we first have to put ourselves in God’s presence! (cf. St. Francis de Sales) That thus requires some form of meditation/concentration.
Another thing is to give preference to mental, meditative or contemplative prayer. (I am mostly distracted when it comes to lengthy vocal prayers like the Rosary.)
I especially counsel you to practice mental prayer, the prayer of the heart, and particularly that which centers on the life and passion of our Lord. By often turning your eyes on him in meditation, your whole soul will be filled with him. You will learn his ways and form your actions after the pattern of his.
St. Teresa of Avila
However, if you have the gift of mental prayer, you should always give it first place. Afterwards if you cannot say vocal prayers because of your many duties or for some other reason don’t be disturbed on that account…During vocal prayer if you find your heart drawn and invited to interior or mental prayer, don’t refuse to take it up…The mental prayer you substitute for them is more pleasing to God and more profitable for your soul.
St. Francis de Sales
They must be said with strict attention of mind and with affections aroused by the meaning of the words. Do not hurry along and say many things but try to speak from your heart. A single Our Father said with feeling has greater value than many said quickly and hurriedly.
St. Francis de Sales
The essence of prayer, whether it is vocal of “mental,” is paying attention to God, speaking and listening to Him.
(cf St. Teresa of Avila)
Ejaculatory prayers are also good for us.