Don't get me wrong bro. They don't look bad at all, except for one with some fading going on. But that could just be a temporary PH thing and most seeding usually grow out of it. Especially if only one out of all plants that are sharing the same inputs.
Besides that, they look okay to me. You really don't need to discount your harvest so early on. Even if you suspect you did something wrong, you'll be surprised how strong they come back. Just don't do anything overboard like me and get them all sunburned. Excessive stress like that could shock them into premature flowering and that will really cut your harvest significantly.
One more thing is each seed grows slightly different. It don't represent much at this stage. Even if your last grow shows the same, don't mean its the same this time round. Some seeds are faster, Some slower. Genetics might give this plant larger indica leaves and another the opposite. Some taller, some bushier. You get the idea. My smallest plant was my best smoke last round.
Don't worry too much about feeding at this point and just enjoy the experience. Learn as much as you can this round and implement the lessons learned next round. Pretty much what I see everyone do here, new and old growers alike.
Have fun bro!