My sister got me this lily a few days after Easter. It's been about a month in, and its blooms have just all finished. Since then a lot of its lower leaves are yellowing, and my research says this is normal, but I'm not entirely sure what I need to do. A lot of the care instructions I come across are for potted lilies like mine that get planted outside, but I plan to keep mine indoors. I'm also not really invested in getting it to rebloom or anything, I just want the plant itself to be healthy. Should I just remove the yellowing leaves, or is this widespread? What exactly am I supposed to do with my lily, keeping in mind that I intend to keep it an indoor plant?