growing seedlings

Hi I'm new here and just started growing my own plant. I was able to get my seed to grow a trap root, but at super snail speed. I put it under a heating pad and kept the paper towel moist and with two plates covering it. It grew maybe 1mm in a week and the other that has about a cm taproot I...

I currently have a few autoflower seeds (Bubble gum & Kush OG) and I want to plant some seedlings, currently i have a bag of Foxfarm Ocean soil. Is this okay for seedlings? heard accounts that this may be too "strong" of a soil for seedlings, but i would perfer not to have to purchase more soil...