Visit a garden centre. Look at their book section. ‘Be your own vegetable expert’ is the book for you! Homebase sell them too.
Baybee the best I’ve found is Mel Bartholomew’s Square Foot Gardening Techniques. He has an on-line site for further information or check out his updated book from the free public library.
/Lamar
For a vegetable garden, you need full sun. The more sun the better. As for other details, so much depends on your site, and your preferences.
If your soil is good, just till it, loosen it up and add compost and you are good to go.
If your soil is clay, or compacted, a raised bed (box) will be good, but you will need to bring in good soil.
You will always be perfecting your garden. Just start and learn as you go. A good source is