Hey i follow along.
Im thinking she looks burned (week 2) Wait until 3rd level of leaves are started to grow about twice it's size as now or from around week 3 from seedling.
I grow with medium though..
Start only with Vegging nutrients until they dont grow in size. I use Bio Bloom on some strains after 2-3 weeks in flowering as they are still stretching.
After that give them Bloom nutrients otherwise they will turn yellow earlier and loose the chlorophyll in leaves that they need to catch UV with to fill the buds up.
๐ Hoping it makes sense and can help you in some ways.
like