Give more care to the “Hours Prayers” from the Agpia:
If you can’t pray each hour completely during the day, at least pray the parts and the absolution of each. You can be sure that it would not take more than a few minutes from you, during which you lift up your heart to God during the day’s struggles and anxieties.
What would help you here is memorizing, so the more you memorize parts and psalms from the Agpia, the more you will be able to pray without a book and without anyone noticing...