I think your plants look very well and healthy.
I am on my first grow at the moment as well, and im tending to find that its very easy to panic too early.
For example, one of my 6 plants leaves are all now bright yellow, i worried to start with but its producing buds and thc in vast quantities and looks as healthy if not more healthy than the other 5.
Take it easy, have a smoke and chill out.

Keep up the good work!!