Looking good to me. Some old yellow leaves at the bottom isn’t anything to worry about.
Are you measuring runoff to get your PPMs just to ensure you’re feeding at right level?
I don’t remember if you are using FF but they have a Bembe product that I think is just molasses and another thing or two, but should be used once buds start forming. Something to do with sugars, you can do the research if you like.
I think all is well, remember to enjoy and not worry too much!
Im just beginning week 2 ill share some pics once we get some flowers going.