just got around to this thread.

Yes by all means start small. biggest mistake for someone new is starting big. They all get overwhelmed. three 4x4 raised bed is a pretty good start.

GLC's advice on succession planting is excellent.

For just the two of you, two tomato plants may be enough. one zucchini plant is plenty. In a humid environment, they tend to turn into giant club overnight.

Try beans and stake them up a pole (pole beans instead of bush beans) to save space. You can also do this with mellons. Mellons will require a "hammock" to keep the fruit from pulling the vine out of the ground. Cucumber is pretty easy too. There are lots of kind of cucumber so you need to decide what you want to do with them.

If the summer is hot, save the lettuce for fall and winter and away from direct sun as this will make for a very bitter green.

Tomato plants can get really big so keep that in mind. Oh if the dirt isn't that deep raised bed, you may want to grow patio tomato. They tolerate limited space for the root better than most other variety.

Also try some herbs. Basil, parsley, thyme and oregano are relatively easy. Thyme and oregano tends to be very invasive and so you may want to just pot them.

And enjoy the fruit of your labor.