Concerns about managing overall health

I didn't realize my stomach was in poor condition and I have no family history, but after an endoscopy, I found out my stomach was not good. I also had Helicobacter pylori, so I was prescribed medication. I eat regularly and don't like to eat late at night. However, I was surprised to hear that my stomach was not well. The Helicobacter pylori was eradicated after medication and testing, but since it is related to stress and the stomach, I think my stomach condition worsened because of that. I was under a lot of stress, especially due to family matters. My stomach had been quite bad for several years. So I believe my stomach has become quite unhealthy. When I am stressed, my body definitely suffers.

I don't know how to relieve stress in my daily life, so what is the best way to relieve stress?