Need help setting up on Google Cloud

I have the latest version installed on Google Cloud where I also have a VM SMTP server that uses nodemailer.

Following the tutorial I don’t understand setting up cron jobs. What am I supposed to put as commands in google clouds ssh.

When I click Fetch IP Lookups in system settings it states - Automatically fetching IP lookup data failed.

I also am having trouble connecting my SMTP server ERROR:
Connection could not be established with host 34.135.100.250 :stream_socket_client(): unable to connect to ssl://34.135.100.250:0 (Connection timed out) Log data: ++ Starting Swift_SmtpTransport !! Connection could not be established with host 34.135.100.250 :stream_socket_client(): unable to connect to ssl://34.135.100.250:0 (Connection timed out) (code: 0)
++ Starting Swift_SmtpTransport !! Connection could not be established with host 34.135.100.250 :stream_socket_client(): unable to connect to ssl://34.135.100.250:0 (Connection timed out) (code: 0)

Can someone please assist.

maybe this tutorial will hep?