Katie, your plant looks fine, though as you point out, the lighting is poor.
There is nothing you can do to reverse that "shock" of transplanting, but time and good growing conditions will solve that problem. Do increase your watering so that the potting media stays constantly moist. Be sure you empty that catch-saucer after watering. You don't want the pot sitting in water. Fiddle leafs need good, indirect light (never direct sun from 10:00 AM till 4:00 PM) and air movement to help those huge leaves transpire. Because you keep it indoors, the plants there will be in low humidity. If possible, mist your fiddle every day or two, at least for a month to help those leaves. Do this in the AM so that the leaves can dry before nighttime. I "feed" my fiddles every week but dilute the fertilizer by 1/2. As I pointed out, they are heavy feeders. That's easy for me to do because I have over 1000 tropical plants and am always watering/fertilizing something.
If you can get your fiddle leaf outside, in a shaded place, that would be excellent. Keep in mind these are truly trees.
Best of luck.
