Hi tillanate10,
i don't want to appear rude but in my opinion you're losing your time.
The growroom is inappropriate.
The light is not enough and too far from the buckets.
The dirt u're using seems to be too compact.
All these things are so clear giving a look at your first photo. I can assure you that is not normal after three weeks to have a so small plant.
My suggestion is to check this forum, read as much as possible and then try again.

Good Luck