When you grow seedlings there is a bit more work involved than picking up the plants at Home Depot.
Here are some resources that can help:
These about hardening off your plants, something you need to do about a week to ten days before you plant outside.
#1,
#2.
Here are some
germination charts and also has other info about general seed starting.
More info about
seed starting and germination.
This site includes information about potting mixes, germination, how to plant, how to transplant, etc.