I agree that a lot of the advice is overkill. But there is a case for it. I am/was a software dev/data engineer and wanted to get more conversant with the server and network engineers where I worked. Often times, I passed off infrastructure setup to someone else and was pushing the limits of what our IT organization was good at. I had to wait for them to learn containerization/K8s, certs, firewalls and just general linux command line familiarity. We are/were a Windows shop and if you couldn't point and click, staff wasa stymied. Summing up, set that stuff up if you want to learn and apply it in the enterprise, not because you, the spouse and kids need it at home. :)

Beszel is my go to monitor now. It gives a quick glance at all my nodes, NAS and even my PC. If I want to dig in, it's one click. I can also change the time frame and review the last 12/24 hours at a glance. I tried pulse and proxmon. Both were good, but needed multiple screens to see the whole environment. Grafana and Prometheus are the gold standard, but configuration seems like a skillset in itself and it does take more resources on every node.

This monitoring video definitely helped to show how min racks suffer heat creep where the components leech heat off each other.