My lil baby has developed yellow leaves, is this d...

It is not a lack of light. How much ML did you have her? Make sure your soil is not to wet and not to dry. For beginners it is harder to find a perfect balance. Thats why i got this tip for you: Do you have a scale? if so you should calculate your pots on how heavy they are when dry and when given water. By doing this you can always know when to feed her and when not too. I don't know where you live but here in the Nothern Europe we don't get much sunny hours a day meaning that the pots don't dry up as fast as we want too. Adding new water when your soil is still wet can result into many problems like a shutdown in your case. When a plant goes into shutdown it doesnt take up the water anymore for some days and will get nutrients from leaves which i think happend now. Also by adding to much watter your medium(soil) cant't ''breath'' and they do need to. It can scream for (N)itrogen. There is not much you can do for now but wait until your soil dries out(not to much). and slowly feed her a bit every 1-3 days depending on how much she can take. Be easy on her and start giving only like 50-100ml of water. No nutrients needed yet because she is a seedling + autoflower.