Yeah I've had common evening-primrose, prickly lettuce, tall hedge mustard as spicy as wasabi, chicken of the woods killing our plum tree lol, now what looks like artist's bracket too in our garden this year. But to be fair most of these seem to grow almost everywhere. Once you learn to identify one of these you will really see them everywhere.

Are you an ogre per chance?

I'm just a beginner and I live a totally different biome, not sure I can help you much. I guess learn the basics of foraging and plant&mushroom ID (like never eat something you aren't certain you've identified correctly). See if there's any local organizations that can help you out. If you're a social type you could make friends with some local forager and gather seeds and plants to propagate. If not, buy some books about your local area, find a foraging YouTuber in your area. I generally use plant&mushroom ID apps to scan everything I see, look up the plant and what its uses are, what are common poisonous lookalikes. You will get the hang of it pretty quickly and have a few plants that you can confidently identify. I've looked it up and perhaps you can find these in your local area: Cattails, Watercress, Water Mint, Water Lily, wapato, Water Hyacinth, Elderberry, Pawpaw, Fiddlehead Ferns and it seems many of the culinary and medicinal mushrooms should grow where you live too.

I guess if you're planning to grow non-natives too, you could try to plant some perannial/ self-propagating/hardy staple crops. Taro, water spinach, wild rice, lotus, sorghum etc.. Perhaps the Chinampa technique works in a swamp? Perhaps you could use the swamp water for self-wicking raised garden beds to grow regular crops that are pretty hands off like sweet potatoes. Might want to do a water test to check for salinity and excess nutrients tho.

I guess you can always have some gator barbecue too, if you are so inclined.