Hello there - I am also new but some things I’ve observed recently… do not fill to run off for seedling… moist soil tuck it in not too deep and leave her be… I lost one also I feel your loss!! As for the light that seems very close… you don’t need a light until the sprout and which point I believe you should use the recommended setting on the light about 18 I believe?? Don’t quote me on any of this haha… I had mine on but just to keep temp even… also dome helped keep humidity around 75… you can check mine out also if you like I ask lots of questions too 
3 Likes