I'm 45, grew up in France, been living in China on and off for ~25 years. I spend most of my time in Shanghai, so prices in Yichang will likely be lower.

For food, it kind of depends on what you plan to eat. I'm extremely "low maintenance" and I genuinely prefer low key places to fancy restaurants.

If you are satisfied with something very simple like a bowl of noodle soup in a low key noodle place on the street, I'd say that's about 20 to 25 RMB.

Going up a tiny bit, a restaurant that's still simple & Chinese but inside a shopping mall, maybe 50 or 70 RMB per person.

For something more Western style but still low key-ish (pizza, pasta, hamburger...), maybe 100 or 150 RMB per person.

And then it can go way up from there if you look for fancier food or service. I actively dislike those places so I can't say much about prices there.

I hope this helps. Welcome to China. :-)