Here you can find a directory of resources for you to get started that includes guides, monitoring & alerting tools as well as general resources.
https://medium.com/solar-labs-team/cosmos-how-to-monitoring-your-validator-892a46298722
https://medium.com/simply-vc/cosmos-monitoring-and-alerting-for-validators-8e3f016c9567
https://chainflow.io/cosmos-validator-mission-control/
https://medium.com/cypher-core/cosmos-how-to-set-up-your-own-network-monitoring-dashboard-fe49c63a8271
https://github.com/InjectiveLabs/peggo/tree/master/monitor
https://github.com/social244305-Architect/peggo-prometheus-exporter/blob/main/README.md