Bend forward and let the arm that was operated on passively hang down. Then, pick up your garment with the hand of your unaffected arm and gather it from the bottom edge to the neck hole. Without using the arm you had surgery on at all, use your other arm to pull the correct sleeve onto the arm that’s been operated on. Pull it all the way up you arm and over your shoulder. It’s typically easier to slide your shirt over your head if you do so while standing up. Use the arm that didn’t undergo surgery to pull the garment down over your head through the neck hole as you stand. Bring your unaffected arm up through the inside of the garment toward the remaining sleeve. Push your arm all the way through the sleeve. At this point, your shirt is likely on properly, but bunched up around your abdomen. Use only the arm that wasn’t operated on to grab the bottom edge of the shirt and gently pull down so that it’s no longer bunched. To take the garment off, use your unaffected arm to grab the bottom edge of the garment and bunch it up toward your chest. Then, bring this same arm toward you inside the shirt in order to get it out of the sleeve. Bend over at the hips as you pull the garment up over your head with your unaffected arm. Finally, work the garment down your affected arm with your unaffected arm.

TL;DR in Indonesian:
Tekukkan pinggang dan kumpulkan pakaian di tangan. Gunakan lengan sehat untuk menyelipkan lengan baju pada lengan sehat. Selipkan baju di atas kepala dan berdirilah. Dorong lengan sehat melalui lengan baju lainnya. Tarik pakaian dengan lengan sehat. Lakukan langkah di atas secara terbalik untuk melepaskan baju.