In February 2020 we (@Vorobiev_Cloud, @MstrsObserver) were giving Prometheus workshop at InstallFest 2020. You can find the repository with the practical part here: https://github.com/pipetail/installfest20
Graduated CNCF project (in 2016, second project after Kubernetes) - Powerful tool for metrics and alerting - works well in machine-centric or dynamic service-oriented architectures systems