I spent two summers living with my grandparents (87 & 89) in Ireland and helping them with their everyday needs. Three months, my grandmother had a (healing) broken shoulder; so I did house keeping, helped her in/out of the shower, helped make meals, and gave out daily medication to both Nana & Pop-Pop. We frequently went on walks as well. The second summer was more intensive, my grandfather had leukemia and taking care of him that summer was more challenging but I handled it well.
I look forward to working with your loved ones and treating them like I did my own Nana & Pop.