Lettuce was easy, just several hours in the sun and plenty of water, with some vege fertilizer once in a while.
You should try Everglades tomatoes. I'm guessing you are south of Tampa from what you wrote. They should grow very well. They are tiny, like dime sized, but very sweet and not very acidy. Once the plant gets going, which takes a bit, it really goes as long as you feed it once a month and water regularly. They need a good bit of sun though. You have to order through the Internet. I'll see if I can find the last place I got the seeds, paid very little, like a dollar or 2, if you are interested, or I can send you some for free if you want. They are the only native tomato to Florida and will grow pretty much year round with minimal care, and boy do they produce. And they spread, we had little sprouts growing everywhere in our loose stone walkway in our little courtyard from the birds stealing the tomatoes and dropping seeds.
I've grown collard greens, tomatoes, Roma and the Everglades, eggplants, beets, leeks, herbs, swiss chard, shiso. I never had much luck with peppers or cukes. I'm trying again with peppers, Shishito and Yatsufusa hot peppers, in huge pots. I also just started a new Everglades tomato plant, which is why I had purchased the seeds, and a new pot of shiso.