PSA: Do not direct people to specific instances on the Fediverse.

You should always direct people to a landing page where they can choose from or be directed to multiple different instances.

https://kbin.pub/en or https://kbin.fediverse.observer/list
https://join-lemmy.org/ or https://lemmy.fediverse.observer/list

You can direct people away from specific instances if, for example, they have been de-federated.