At 6 weeks it is entirely possible that it is showing preflowers-they usually do right around that time.
If you have someone who has grown it out he may know. You say the leaves are only 3 fingered not 5-at 6 weeks old this seems unusual to me. Lowrider is a cannabis ruderalis-as opposed to indica or sativa (if memory serves)-i might google some pics of cannabis ruderalis and see if it is a three bladed leaf. This will give you a good idea if it is or not.
As to support-just give them some if they need it-no need to bin it when you can tie or stake it up-like tomatoes ya know.
Now there are a few things to understand about bag seed before you put this one into flower.
Bag seed often comes from a hermie in a crop of otherwise sensimilla nugs. These nugs could be any variety, from skunk to white widow to diesel and so on. If these seeds come from weed that is a hybrid-of any kind (f1, f2, etc) then it will not be a stabilized strain that will match the nugs it came from-it might, but it is just as possible it could revert back to any of the 2, 3, 4 or more species of cannabis that went into making that hybrid-so if you germinated 3 seeds from the same bag, in theory you could end up with three different strains one or more of which may be the same as the bag of nugs or any of its ancestors. Also the possibilty of hermaphroditic plants are very high from bagseed since the source was often times a hermie, thus you need to keep a close eye on them in flower.
I hope some of this makes sense. The only time I have ever grown bagseed i got 2 distinct strains-from the same bag of dank, grew them till sexually mature (showing pre-flowers) and took clones, flowered the clones to see what yield, growth habit, flowering time and most importantly taste and smoke/buzz was like. From there I decided what worked (if any for my op), maintained mums of the winners and currently feed clones into flower from those i liked. It is still one of 7 strains that i maintain and grow every 3rd or 4th batch in a perpetual harvest SoG set-up. Great strains have come from unknown bagseed-just look at Chemdog. It is all about cloning the mums and picking only the best phenotypes.
As to your issue of being in the US-me too-bible belt even. Check out seedbankupdate.com-i think you will find plenty of reputable sources that ship "worldwide". I have used a couple on his list and have never had any problems.