Exciting times! Caught this one early, will follow for sure. A bit of advice though, seedlings don't need any feeding whatsoever until at least week two depending on the medium. If you're seeing yellow curling leaves it's probably nute burn at this stage. What's your grow medium?
Also watch the watering, I only mist the seedlings and soil till the second set of leaves get moving.
Water only when the container feels light and the medium is pretty dry an inch down, you'll get a better sense of it as the grow moves on. And my last 2 cents is to not do photos and autos in the same grow space. Auto yield won't be very good on 12/12. Keep it simple till you get a couple grows in.
Patience to let the plants do their thing is hands down the most difficult thing to manage for your first grow. Going forward it'll help if you post the vitals of your grow, ie lights, total wattage, grow medium, pot size, nutes and what day or week you're on. That way if you run into trouble we'll know what you're working with to deduce the cause.
Good luck bro, nothing beats growing your own!
i am happy they are all out and reaching for the sky 
