Struggling with Homelessness and Unhealthy Diet: Seeking Advice

Hi, y'all, I'm mostly looking for advice. I am 20 years old and homeless, and between food stamps and my limited income I struggle to eat well because foods that are cheaper tend to fuel my weight gain. I actually like eating veggies and reduced my carbs by a lot, despite my mostly Japanese food diet, before I became homeless, but now my diet is mostly bread, potatoes, ramen, and cold cuts, all things I was told to avoid due to prediabetes, approaching obesity, and high triglycerides. Still, when I could get 2 cucumbers for $3 or 6 packs of ramen for $3, it's hard to make the healthier choice. Do you have any advice, cheap healthy foods, or anything else to say about it?? Thank you!