My first auto grow

Actually it depends what kind of soil do you use and how did you prepared it. For first week it can grow even with distilled water feeding. Do not feed around seedlings, first two weeks pour water at the edges of the pot. Roots should seek for water. And also looks like there is light deficiency.

Get a jewelers loop, 10 bucks or so 15-30x minimum, its the only way to know for sure where you stand, everything else is guessing. Look at the tricone a LOT so you can begin to learn their structure and colors. When to take the plant is subjective, the effects will change based on when you harvest. All a milky white color with mushroom heads will do though it is VERY easy to miss the clear tricones. I wait until I begin to see some amber (very little unless I am growing some sleepy time stuff anyway) then its done IMO. Get loop and study them, it will pay off.