my best advice is to only plant enough to eat - start small to get the hang on tending a garden. I'd start with about four plants each of the ones that produce many veggies - you'll have to pick them every 3 days - ex. beans, peas, tomatoes. Plant more of the ones that are singles ex. carrots - and choose which to plant wisely - lettuce is so hard to keep away from bugs.
Read the other posts for advice on how to start plants, etc. and check out your library for gardening in your area - climate and soil are very important. Also, you'll get tips like planting marigold near tomatoes to keep pests away.
I do not garden at my home, the conditions are not right in my windowbox. But I do have a few of my own rows in my mother's garden.