Ficus like bright, indirect sun, direct sun will scald the leaves but that doesn't look like what's happening. In the Northern Hemisphere, South facing windows are best because the sun is always south of directly overhead. They also like high humidity, get a cheap hygrometer on amazon, should be at least 50%. He looks thirsty to me but over and under watering can look the same. This can help you get the soil moisture right https://www.amazon.com/.../ref=cm_sw_r_cp_api_2ZHDzbW4MF3Q0 water thoroughly when you do but let it almost dry out between waterings (the roots, not the top of the soil). Also some plants are sensitive to tap water so if you can collect rainwater is ideal.
Shallow watering can do more harm than good by making the roots grow toward the surface. The inner pot should have holes in it so the water can run all the way through but still evaporate out so you don't get a pool in the bottom. And most plants love an occasional shower, leave them in for 5 min to flush the soil completely once in a while. Plus it cleans dust off the leaves and is closer to the natural process of rain. And shake or pick off all the dead leaves, it's just necrotic tissue, a breeding ground for bacteria and more decay. Try to imagine the natural environment plants have evolved in, where wind, rain and animals occasionally shake the branches and clean the leaves.
