the usual First Saturday Devotions
The First Saturdays Devotion was wanted by Our Lady and confided to the Fátima seer sister Lúcia with the aim of reparation.
In my own experience: the First Saturday Devotion is extremely powerful, one needs only to consider the promise that is associated with it. That Our Lady come and get you herself, her devoted servant, should you come to need it, on that First Saturday.
As for reparation, looking at the example of saints Jacinta and Francisco Marto, any sacrifice made during the day can be dedicated to reparation of sins, offenses, and salvation of sinners.
The “Fátima chaplet” is independent of the “First Saturdays Devotion”. My personal advice would be: concentrate on completing the First Saturdays Devotion!! That should be reparation enough, that is what Our Lady wanted. (It is not easy! If done right, the devil will be at every corner trying to stop and derail you.)
It is perhaps, the closest thing to experience the Portuguese discoveries, embarking on a 5 month spiritual journey, isolated, heading into the unknown, in God’s hands, with heightened awareness of the stakes and risks, the potential catastrophic loss from the slightest mistake and slip, longing for that day of arrival in safety, when finally the ships chaplain -for that small crew, moved by sheer faith- confesses you, celebrates mass, and shares in the meditation, prayer of the rosary, devoted to Our Lady. Porto seguro, por fim.
One final thought: First Saturdays Devotion is bound to be practiced in a specific church on the day itself with confessions being offered before the rosary and mass starts. If possible, that is in my experience, the ideal/optimal setting to conduct the devotion, because prayer of the devotion, and meditation, is lead for the assembly with the priest and experienced laity or religious present.