Nice job!! you definitely have bunches of "cell tumors" or baby plants, I've seen plates like this before.
You must've put a TON of seeds on this plate, but that's ok...you're doing well so far. I think since what you are doing right now is working, don't change it...just go with the flow.
Let them grow, and get larger. Its just easier to deal with them when they are larger and have more stored energy. Keep us updated, but don't touch these guys for a few months...I'd be looking for small leaves to develop, very small. They are delicate, so just keep on doing what you're doing, and all will be well