First time grower just looking for advice!

hey how are you today. i hope ur doing well and have a second to look at my plant pictures and give me some advice and tell me if they look healthy and if im on the right road. the plant im showing off if a chernobyl from tga it sprouted about 23 days ago and has been under 24 hour cfl 6500k lighting and rectly i added a 2700k bulb. fox farm happy frog soil. she is in a pc grow case for the time being im waiting to get my tent and 600w.oh i have transplanted her once. the last picture can yall tell me what the yellowing of the middle of the leaf means? thanks so much for your help have a wonderfull day and thanks for reading!!

free bump 4 you sir.

It looks fairly healthy overall. New growth sometimes is lighter then established leaves. I wouldn't sweat it.

At the 3-4 week mark is usually when it's a good time to start introducing lite doses of nutes. What are you planning on using?

honestly i have no nutes at my house. my green thumb friend said it would be good to put some crab shell in the soil next time i transplant but that is it. what should i do if i wana go organic. i know the happy frog has a whole bunch of good nutes in it already right? thanks for the help man for real. like this is my first grow but im prepared i did alotta research and alotta time and effort went into gettign to know how to grow before i started.... and growing is already my favorite hobby its awsome.

Hey Rasta mon, plants look good. Peace

For organic you could go with fish emulsion. Or neptunes harvest.

thanks darth butter