I’m in a similar boat except I just do everything on standard Docker containers but so do use Telegraf, Influx, and Grafana for everything. I’ve gone mostly to Discord notifications on any alerts. If I run into any problem scenarios, I figure out how to monitor it and add it via Telegraf and add an alert. I’m still just using Grafana alerts but it works fine for my home lab.
Even better if I can automate fixes to those problems. One of the best things I did was monitoring all of my network devices and all major hops. If I have internet or network issues, I know exactly where the problem is without having to troubleshoot. Lots of dpinger and shell scripts to input data to Telegraf.
I user homer. Really simple, basic config and it looks nice. The stats are pretty cool for certain integrations and are easy to add - I’ve added a few myself for services that didn’t have them. Only issue is slow PR review.