I wouldn’t worry about the little droopy spots or the white spot yet, plants to young and it’s not extensive enough to be diagnosed as anything for sure.
A good piece of advice would be exam your plants with your lights turned off and a white color light such as the light from your phone or a flashlight.
Also try to take pictures in the dark with the flash on to share as much can be hidden under burple lights such as you have.
Organics for indoor small crop cannabis is not my cup of tea per say. Egg shells and any other toppings your adding won’t be broken down for months just FYI.
Lesrning about how to grow organic on a small footprint will be to your benefit as most growers don’t go this route, such as myself, due to the challenges vs output. Growing with non organic fertilizers is much easier and much cheaper, while also producing more flowers at the end of the day.
Keep your soil moist, alot of organic biome dies when dried out.
When the leafs go past the edge of the container it’s time to transplant, until your at your desired pot size. After that the goal is to figure out how to get organic nutrients into the soil, this can be done via top dressing or by Brewing organic nutrient teas.
Also avoid over watering to run off, unlike salt based grower you really don’t want to have any run off because it drains nutrients. Salt based growers do this to avoid buildup in the root zone that changes PH and thus nutrient uptake.
You seem to be doing fairly good for your first time so keep that up.
You may want to learn about DLI and VPD, in short print off a cannabis VPD chart from Google images and read the first page on my thread here.