Go to the base domain you configured (deeploy.example.com) to see the Deeploy UI. If all previous steps succeeded you will be able to see the Deeploy login screen. Check the inbox of your configured initial admin account (step 5). Here you should find an invitation to set a password. In case you did not receive this email, you can always use the reset password flow to create your password for this account.
After logging in for the first time, you will be able to create your first workspace. In this new workspace, you will be able to invite and manage users, as well as create your first deployments.