First time growing

First of all sorry for the quality of the pictures, from week 4 i have better pictures. this is my first time growing, so i think i´m making mistakes but that´s the way you learn. i germinated in jiffy pellets, it took 5 days till i could the sprout, then i put them in a big container (11 liters) i did not have smaller containers and i read that theres no problem putting them in a big container except that it could grow slower. One thing i noticed is that in 1 of the 4 plants the shell get stucked and i was not able to see the cotyledons but i put it under the light because my other three plants were ready for that.

During the second week the plants grow pretty well, as i notices in one of the images in one of my plants the shell never fell so it was smaller than the others and for a moment i thought it was gonna die :(, luckily i decides to open the shell with a knife and being really careful. i took this decision because i was able to see some leafs trying to reach put of the shell, i didnt film that or took a ic but in the photo you can see the shell and that the leafs are considerable smaller that my other plants. i will try to upload more pictures of this week but im editing them so you can see the better. also my plants were a little smaller because i put more soil. i didnt use fertilizer until the end of week 3, now i know that i should started fertilizing in this week. i also put my light a little bit down (5 cm) because my plants were stretching a lot.