Hi! I too am underway on my first grow.. or second for you by the sounds of it? So of course, I am just a beginner myself.
The first picture in the last set looks like the leaves are drooping a fair bit? How often do you aim to water your plant? The next two pics look really good!
Lights.. unfortunately, they are the most important item of the grow from what I've read. Unfortunate because they are expensive!!
I used a low wattage CFL bulb for seedling, just switched to 400W MH for growth, and will switch to 400W HPS for flower. From what I've read, seedlings don't want a very powerful light yet. Low CFL's are great for this. Also, I do believe switching light spectrums from veg to flower is important, but don't know all the details! Only know about HID (High Intensity Discharge) bulbs, which is MH for veg, HPS for flower.
Good luck!!