First grow ever: micro Hindu Kush Auto

First thing i would check for is root rot. That can cause nute lockout. If no root rot. Check PH level as that can cause nute lockout and other symptoms. If PH is good at runoff, maybe build up of bad fungus or microbes in the soil where Mycorrhizal fungus helps as well as good old fashioned earthworms. Plant disease can be a culprit as well. Some plant diseases mimic nute deficiencies. I had the same problem during preflower on 1st grow. Found out it wasnt draining well enough and mild root rot formed. Made a few more holes in bucket and flushed the soil til i had at least an inch of runoff so soil was neutral again. After about a week and a half the plant slowly recovered and continued the flowering stage. Flushing most times than not helps with any nute lockout. I would remove any leaves that are half dead. They are only hurting your plant by using valuable nutes that could go to good leaves and bud sites. Unless it will lead to over defoliating. It is wise to note that this stress may affect overall taste size yield and flavor of flower. Happy growing and I hope the issue is resolved with your ladies soon.