Hey Alexa, good news : nothing is wrong with your plants ! You have totally normal and healthy plants, just a minor nutrient burn on the tips of the leafs but nothing serious, just feed a tiny bit less and maintain that level. The hairs are normal, and the white things are trichomes , which is where the THC lives meaning that your plant is already starting to put out. It's gonna be a strong one ! Nice wor ! Hope this helps ! π