Is Fox Farm's Light Warrior available in Canada? If not, get a mix specific for starting seeds and start them in seed starter peat pots. Or even the cheap plastic starter trays. I like peat pots for burying when up-potting so not to disturb (possibly damaging) young roots. But the cheap plastic ones are not too hard to rip carefully.
§467. I am sitting with a philosopher in the garden; he says again and again “I know that that’s a tree”, pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: “This fellow isn’t insane. We are only doing philosophy.”
― Ludwig Wittgenstein, On Certainty