I have way too many questions for you. Your best bet would be to find someone in your neighborhood with a big healthy garden and ask them for help. Elderly folks with green thumbs are more than willing to help.

Where do you live? How are your plants dying? Bugs? Animals? Are the seeds sprouting and the plant dying afterward? Are you using fertilizer? How much, how often and how do you apply?
Are you using potting soil, local soil, mulch mixed with dirt?
Do you compost and use it? Are there worms in your soil?

I have way too many questions for you. Your best bet would be to find someone in your neighborhood with a big healthy garden and ask them for help. Elderly folks with green thumbs are more than willing to help.