Sabrina - I agree with Sue. I think probably most every gardener has at one time or another killed plants. I know I have.
My rule of thumb is to water once a week any seedlings. And I have a warm climate on a sunny windowsill. So if you aren't getting lots of light, then even less watering. Rot kills a lot of seedlings.
I have faith that you will discover what works for you in your climate and environment. You have folks here that are giving you some excellent advice. Don't get too discouraged. It's a learning curve. You'll figure it out.
