Good luck. Just don't overwater! When they are that little I really let them dry out in soil. So it goes like a dessert. If that is soil and you keep them damp all the time then the roots will rot and the grow won't be anywhere near as good. I see it all the time. 3 weeks in and roots are rotten, leaves start yellowing, people start adding more nitrogen - then it's fucked. Just let it go desert dry, so you are amazed how dry the plant can be. Water them when the 1st plant starts to almost droop.
What size area and what light are you using? Those pots look kind of small for auto's. 6 litre pot for auto's is the absolute minimum. 6 litre pots are great for auto's. Stops them growing too long, they seem to root it out pretty quickly.
Don't let them sit in water. Maybe order some trivets and put them over the drip trays? I'm doing an auto grow next
I have grown many autos under various lights. 4.5 litre pot 3/4oz-1 1/4oz yield. 6 litre pots can yield 2/12 oz easily even in soil. I find anything bigger the plant just grows for longer and takes up all the space, then they get cramped.