Where do I start to learn how to create a backyard vegetable garden?

Image by Northern Ireland Executive
Social Development Minister Nelson McCausland has officially opened the Drumarg Community Vegetable Garden in Armagh.
The Drumarg Community Vegetable Garden is an allotments project funded by the Department for Social Development.

Question by Gaurav K: Where do I start to learn how to create a backyard vegetable garden?
I have a roughly 20’X3′ area in the backyard that would be perfect for a vegetable garden. Having grown up in the city I have very little clue about gardening.
Where do I start to gain knowledge about gardening and specifically about vegetable gardens. The vegetables/herbs/fruits I would like to grow would be tomatoes, parsely, lemons, etc. Suggestions on what is possible are also very welcome.

I am looking for recommendations on books, websites, etc.

I am in central California, USA.

Thanks very much in anticipation of your replies.

Regards!

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