To create a password on Substack, follow these steps:
1. Head to https://substack.com/sign-in
2. Click "sign in with password"
3. Select "Set a new password"
4. Enter your email address and click "Send Email"
What happens next?
You'll receive a password reset link to your inbox and can use that email/password combination to sign in to any of your Substack subscriptions.
Tip: Go to your Settings page to view all your Substack subscriptions.