hey geezy. i`m moving along with my first auto grow also. i started all of my babies inside, then moved outside after less than a week (about 5 days). if you have the lighting set up to adequately give your girls what they need, then maybe keep them inside a bit longer. but my mindeset was that if i get the plants outside and into a variable living environment (sun, clouds, rain, wind, etc.), they`ll become accustomed to the type of conditions they`ll need to survive in through the grow.
also, i would highly recommend starting your babies DIRECTLY IN THE SOIL. I did a bit of an experiement with my germination methods (will post it someday) and ultimately germed 5 of 6 seeds, and now 4 are thriving. the other 2 that didnt make it were started in coco pellets...1 didnt sprout and the other died 2 days after moving her to a small cup with soil. I`m using Gold Lable Special Mix LIGHT...highly recommend the light mixture and highly recommend the gold label brand (company from holland since the mid 80s).
lastly, just in terms of the soil being a better way to start, i have 3 different strains going and all of them have sprouted at nearly the exact same time after sowing the seed (approx. 72 hrs). hope all goes well with your grow!