You must live in a cool place. Of your list I could grow amaranth and lamb's quarters. I can grow okra and peppers, those are easy, not bothered with pests except great hornworms on peppers. Peppers are perennial until they get frosted. Squash family is great unless they get mildew, so keep them off the ground with a trellis of some sort. Potatoes in containers work, they need fertilizer. Only tomatoes that have worked for me outside in the desert are the cherry variety. My advice is hang out at garden shops in your area and get local tips.