Foraging is amazing! If you know how to forage you can eat well any time snow is not covering the ground and sometimes when it is, if you save up food or have watercress springs nearby. Since you are eating mostly processed food right now and don’t have a homestead, that is an excellent place to start. Since you are in Tennessee you probably don’t have snow on the ground right now, so you can start learning winter weeds to forage right away. And when you do get to gardening, food-foresting and the rest, you will have a much more in depth understanding of the ecology because of it. Ben Falk says something to his students about how it’s so valuable to be a forager who gardens rather than a gardener who forages, because you know all the abundance already around you.
If you want recommendations for beginning plants for foraging:
-Nettle greens (tasty and extremely nutritious—won’t sting you when they’re cooked)
-Acorns (takes a long phase of soaking but impossible to mistake, and important calorie source)
-Black walnuts—I’m guessing there are a lot of those in your area; right season
-Persimmons—same
-Oyster mushrooms, hard to misidentify, tasty, can grow in winter
Also, lots of bitter greens (dandelion, chicory, garlic mustard, wintercress, etc.) can be made palatable for eating in quantity through boiling and adding a little salt. They will have a soft texture that might be unlike other green vegetables you have had, but should be nutritious, taste good, and are full of protein. Sometimes in smaller quantities the bitter can be good too…
If you want me to elaborate on any of the plants, or want to hear about more, you can ask. I don’t have experience with persimmons (don’t grow wild here, only have two little ones planted) and have (or had last I checked) a walnut allergy so not as much help with those.
Look to this thread on ideas for self reliance with no land:
https://permies.com/t/no-land
Also look into the SKIP program for inspiration and skills, and possibly being able to inherit land from older homesteaders.
https://permies.com/wiki/skip-pep-bb It’s quite fun and you learn a lot of important skills doing it!