A Very Judgmental Color - My 1st Grow

Seeds are in water per GSC's grow directions. I expect to drain them onto the paper towel tomorrow (can you tell this is a first time grow). Will be using Coast of Maine, and my custom grow box (slightly under 2'x2'x4'). 4 inch inline fan off of an admittedly way too big carbon filter on medium or low gets the temp right, best on low to keep humidity high; oscillating 4 inch fan to dissipate heat and keep air moving. When I tent with plastic wrap, temp remains about the same, humidity skyrockets; go fig. Should be able to get my seeds to germinate. Will be growing in 3, 3 gallon pots with LST only (Still debating on a screen, as I think I might need one given this plants height). I know my light isn't the greatest, but it can get right up on the plants, and I plan on keeping it about 10-12 inches away at all times. I went with panda film as it is my understanding it won't burn the plants. If anyone knows of a rock solid, all natural CO2 method for such a small space, it would be appreciated. So far the best thing I've seen is Reishi mushrooms, and it seems like a 50/50 proposition at best. Are there any accompanying plants that would raise CO2? Plate of garbage? I've heard earthworm castings works, is this true?** I believe I'm going with basic fermentation with a water lock under my piddly fan, seems like it should be enough for the tiny space. I can just use a growler and refresh as needed. I figure I'll give the other two seeds another day, I've already planted my middle child.... I can only hope that it's as angelic and innocent as I was in my youth. 4/19/21 - First sprout! Seems healthy and green so far, going to let two sets of leaves develop before transfer to it's larger growing container, let the roots develop a little bit more. The other two still haven't broken soil yet. Still a little annoyed with myself for dropping the other 2 seeds in the glass, lol. C'est la vie. 4/20/21 - Sprout is...sprouting. Cotyledons still have not shown yet, which is odd 4/22/21 - One of the two seeds planted in the same pot seems to be pushing through, and it also looks like it already has some vegetative growth! No idea what is wrong with the cotyledons on my first sprout, will ask the community. ** There was a seed membrane from the seed shell that was holding the cotyledons (and two wee-bebe leaves) together, a pair of tweezers did the trick! Seems like I can safely move to vegetative growth in the next few days! Will move my wee-bebe to her larger container in a few days, let those first leaves develop. Based on other diaries I've read on here, it seems like this strain goes vegetative for 4 weeks (sometimes 5), so looking forward to watering and using some compost tea! I also have worm castings as well, which I plan on sprinkling into the soil when I transfer the seedling for a little boost (hoping it doesn't burn them). Brushed away some of the soil on #1 and #3 and to my surprise saw seed #3 was a go! Very excited to have had all three seeds germinate!