Colleagues, someone can suggest some UI for easy setup alerts prometeia and json certainly cool, but it's uncomfortable, and I think not only for me. Thank you.
The most common mix is Prometheus and Grafana.
Grafana also providing plugi-in for Prometheus and Prometheus AlertManager. You can find many tutorials online with installation, configuration and integration of both like this.
You could also check other UI's like Kibana or Kiali, however I think Grafana would be best for your needs.