Can someone help me to create a shortcut?

I am using non-Apple email, but Reminders / Goodtask for task.

Apple, of course, doesn't let us create Reminders from flagged emails that are from non-Apple accounts.

The way I've been going around this (when I need to have the info from email in my task) was to (1) copy the subject ;line of email (2) use "Print" functionality to get a PDF of email (3) send that PDF to Goodtask (4) paste the subject line.

Is there any way this could all be automated using Shortcuts ?

I would also like to know how to do this.

I just ended up using Siri. "Siri, remind me about this email in a week". As long as you are using Apple Mail as your mail app, this works with non-Apple emails.

A disadvantage of this method is, of course, that the link to the original email can only be used from Apple devices. But at least the subject and due date sync to the desktop.