Just trying to keep it simple at this point to minimize more errors on my part.
I see talk about extra nutrients and Dude Grows products, that's not keeping it simple.
I saw humidity domes. Ditch all the accessories. Anything that sounds like it's going to help you besides a legit [dry] humidifier, ditch it.
You need semi fertile soil with a ph in the 6's and sufficient calcium, as cannabis seeds have relatively none of their own.
You need #1 nursery pots (0.77gal)
You need to soak the pots in water, with Ful-power
You need to put the seeds in.
You need to mist a wet spot over the seed in 2 days.
You need to keep humidity in the 60s and temps in the 80s so your Led lights will actually move some nutrient.
You need to transplant your 3 week old seedling into its final pot.
Nothing else needs to happen between these steps.
If you add nutrients, you screw up the balance.
If you add a humidity dome, soil fungus now see your seedling as soil/food.
If you buy crap from youtubers, you waste money and get stupider in the process.
If your soil is so bad it has no microbes, then get some free manure, don't buy a jug of sewage off Amazon.
You don't need to know about light science. No one growing pot needs to know that stuff.