You can have autosign enabled on the puppet master but I don't recommend it.
You want to have control over the initial deployments since by just blanket
auto-signing, you may run into some major issues with too much change too
suddenly.
As you gain experience, you can bulk sign in chunks once your initial signs and
time have been producing no impact.
Consider a Puppet run on a node a potentially dangerous production-affecting outage-causing
operation like any other.