Hey, great questions, Carnival! Don't worry about screwing up. I didn't even post on here for my first couple years of growing because my crops weren't up to snuff. Growing takes a lot of time, a lot of patience, a lot of screwing up. And everybody worries SO much in the beginning about their plants. After you get things dialed in, you kinda look back and laugh, and realize that it's a plant, and it'll grow in a ditch filled with gravel, street run off, and antifreeze. Haha. She's sensitive, and you have to take care of her, but really the plants never need as much babying as we think they do. Usually they just need some water, a little nap, maybe some B vitamins, and a couple of days to recover!
Anyway, sorry it took me a minute to get back to you, I just uploaded my current grow journal! Check it out if you get a chance!
So as far as mixing the soil goes, I like to layer my soil so that the roots work their way into the hotter soil. So, I start off by putting a layer of straight Ocean Forest down, about 1/5 of the way up the pot. Then, on top of this I put about another 1/5 of Roots Organic, and then a cup and a half of worm castings. This is your "hot layer", and it makes up 2/5 of your total. Mix this all together.
The next layer will be your "transition layer" where the plants will work their way down into hotter, but not yet totally hot soil. This layer consists of mostly Roots, with a little Ocean Forest mixed in. Throw another half cup of worm castings into this layer, and blend just this top few inches, taking care not to disturb the bottom.
The final layer is where you transplant your baby plants. This is the last 6 inches or so of soil on top, that you can push aside and set your babies into. Remember, this soil now has a ton of nitrogen-rich worm castings in it, so all you have to do is give it water. The plant will grow really big in this soil, and if you mix it up in like a 15 gallon pot, you won't have to worry about adding anything but water until it flowers. That's like 2 months without mixing nutes. 2 months without guessing, or stressing, or going, "Why is my plant turning colors!?" You just sit back, give it ph adjusted water, and worry about giving it nutrients when you're trying to grow fat buds!!