I have started my own vegetable and flower seedlings for years. I find you get a much larger choice of varieties from seed catalogs than you can get buying plants locally. Check out the catalogs from Burpee and Park; the catalogs have a lot of useful information, as well as supplies. Both companies have good web sites as well. You should also check out a few local suppliers' catalogs (such as Gurneys in the Midwest, not sure who would be the best in the Northeast), since they will have varieties that do best in your local climate. I would advise getting a good artificial grow light, and set it on a timer to provide 14 to 16 hours of light per day. Pick up some 6-packs and pretty much any potting soil mixture. Keep the seedlings well watered, since indoor humidity levels are low and seedlings in 6-packs can dry out quickly. It sounds like a lot of work, but it really isn't. I'm sure you will be pleased with the results.