Try to locate an instance that is geographically near you and has a low number of users, as both proximity to the servers and server utilization can impact your perceived latency. You can find lists of instances sorted by geographic location and user count on:

https://joinmastodon.org/servers
https://instances.social/
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence