What are good queries to search for in my SIEM?

Currently one of few in my Company using SentinelOne for threat hunting, we use a lot of security software but it’s a pretty solid SIEM. But when going through the massive load of queries with like 100 companies to index; I am going through failed passwords on the network, dns queries, and just reviewing how our endpoints are communicating.

Is there any advice on specific queries I should be looking at, or is the built in A.I. and behavioral analysis …

cybersecurity search siem