I've grown them outside and in pots. I just use miracle gro soil, and water them good with spearmint tea or water/peroxide solution. Just once because I keep a lid on mine so the water doesn't completely evaporate away.
I would advise you, as I tell everyone else, to just germinate with plain ol' water.
If you don't have a lid. One good soaking at first, and then 3-5 days later (after it has had time to dry out) a good half-soaking (meaning 1/4 to 1/2 cup of water).
They are like weeds, so they do not need filtered sun at all.
It's not difficult. If I read that label, I would think I'd have to send them to a college to grow in a laboratory. And wonder, How are these plants not extinct?
They are very easy to germinate. I didn't even do my first batch correctly, and it germinated. As long as temps are above 50F they will germinate. It will just take longer, like 2-5 times longer (in some cases). 70F is for fastest.
Good luck and happy gardening!