You're looking good. Depending on what your light source is I would think about increasing it if you are having problems getting the plant to stand up on its own. Also once it does stand on its own you'll want a bit of a breeze moving across it to help it naturally develop a strong stalk. Not really sure when I'd transplant though. probably just after they started to veg proper in that cup...maybe 4-6 nodes?
Go to walmart in the outdoor section and get a $2.98 emergency blanket, the go home get in you grow area and remove all the alum. Foil and insert shiny blanket works 10 times better and doesn't create hot spot.