I think you are overestimating the time and complexity to install and set up prometheus + grafana on a box, node exporter on your hosts and copy/paste a grafana dashboard for node exporter (which is your use case).
It gets complex only when you start monitoring your apps (i.e. using a prometheus client library to generate and export custom app metrics) and create custom grafana dashboards for these metrics. Or if you need to monitor some niche technology without its own existing prometheus exporter. Then yes, you need to read the docs, think about what you need to monitor and how, write code...
It gets complex only when you start monitoring your apps (i.e. using a prometheus client library to generate and export custom app metrics) and create custom grafana dashboards for these metrics. Or if you need to monitor some niche technology without its own existing prometheus exporter. Then yes, you need to read the docs, think about what you need to monitor and how, write code...