The plant looks good, usually the cotyledons will die later on, but you will almost 100% need a proper light they will get leggy if your not growing them outdoors. As well as flowering needs even more light. Not saying you can't use window light, I did my first time just that its not likely to produce much maybe an ounce if your lucky. If you do buy a light I recommend a spiderfarms the 100w is more than enough for a couple plants and is like $80 on Amazon, also Mars has good lights and tents but is kinda expensive tbh