The Fox Farms stuff is pretty good stuff. (it's what I've used for the past few years) Instructions are for weekly application rates. Seedlings get 1/4 strength, a couple of weeks later you can up-it to half strength...but they'll let you know if they want more. You can replace Superthrive with the Big Bloom. No real need for both. Before you purchase all sorts of additives, ammendments and suppliments...get used to using your base nutes. (the Fox Farms stuff) You can go broke very quickly "impulse-shopping" for the little ladies.
A cieling fan may be good for ventilation, but they'll need air circulation (a fan) on them to create a breeze. This strengthens the stem, provides fresh air, and dispurses the heat from the lights.
Still too small for transplant. Give it a few more weeks, unless you're wanting to change soil. If anything, that pot is too big as it is. Very doubtful you are seeing roots out of the bottom yet. Likely they're not even reaching the bottom yet.

Looking back at your troubleshooting form: (sorry, was just waking-up during my last post)

How are you going to flower the plant, if it get's to that point? You'll need to keep light away from them during the dark periods. All night, every night...total darkness. Flowering in a working bedroom is a good way to ruin a grow.

ph is a tad low, but still within the lower-limits. Nutes will pull that number even lower, tho. Learn how to adjust your tap water. Unless the quality is super-crappy, it's a waste to purchase water.

Put the lights about 2 - 4 inches from plant, and leave it there till you need to raise them. Dicking with light intensity can stress a cannabis plant. A thermometer is really a necessity for a newbie. Would get one asap.

For next time...It's a bad idea to take from outdoors, and bringing them indoors. Likely will bring bugs in with 'em. (some bugs leave their eggs in the soil)

Keep them off the floor, and away from direct A/C vent. Too cold, and they start to complain.

That's all I can think of right now, and my legs are falling asleep anyway, lol.