Help:(

They are looking healthy to me. Maybe some more direct sunlight and they will be great.

How much light are you using? Try to put more soil and substrate in your pot. As it is yellowish, it may be that you are using too many products. Just try to leave light and water for a week. If it doesn't, I'll be here if you need to...

You are doing good for a window grow. Plant could use more light. Lack of light makes the plants more lengthy. They are stretching trying to find more. Keep your coco moist and a ph of about 5.8 in vegging for run off. Will need to provide nutrition always with coco and some cal mag is needed. I grow in coco. If you have questions feel free to pm me🌱👍

looks okay.. it may need more light. okay, i see you are in soilless... keep it easy your first grow. In coco, you fertilize every singe time. Always get 10% runoff... don't let it sit in it, toss it in yard or down the drain. Wait for top to change color, i.e. it is dry as this will reduce chance of pests and potentially bad microbes from gaining a foothold in your garden. So, rinse and repeat with normal fertilization+10% runoff or more after it dries a bit... always ensure complete saturation. the 10% or more runoff ensures consistent EC and nutrient content of your coco. Do pH to ~6ish if you nutes don't get you there on their own. Good nutes are buffered to do this on their own. If you see issues creep in, hopefully slowly, they likely need small changes. With this sort of consistency in your substrate, you can easily make adjustments to your mix of nutes and get results you expect. e.g. lil too lush/glossy with curl would be a N-tox, so you'd lower the component with the higher N a bit... if it is far into grow, you know it took a long time to get there if you were consistent with runoff and good pH each irrigation. get a leaf chart off google images search. understand immobile vs mobile and other factors to deduce anything wrong with plants. if you stick to plan and don't have concentrtions too high, it'll turn out well. Get that consistency in substrate, and you can adjut to what you see in a very successful way.