Start with something easy, Square Foot Gardening is a good book. Raised beds are the way to go, 100%. I requested new ones for Christmas a couple of years ago. Quick and easy to put together. Get them at least 16 inches deep, better root systems.
You can learn, just don't be too hard on yourself. I have been doing this my whole life. My daddy's garden was about 3 acres. I dropped seeds, helped weed, and dropped plants in holes he made for them. I started learning to can about as soon as I could stand at a sink and wash jars. Some things will do great, others, well, we just don't talk about those. Heck, start with lettuce, that stuff will just about grow in the cracks on a sidewalk.