Laravel - queue controller/form actions (to avoid overload error)

I have a form where submit-button will start something from a controller I have:

1. It will send an email to me
2. It will take all posts from the user who clicked submit, and change the status of them to "idle".

The second thing works fine, until the user has a alot of posts. Then the form won't process and go to error page for overload instead.

So I'm thinking I need to create a queue-job for the second part somehow. Like for emails but for the posts. Not sure how though..

This is done in laravel - and you will only get a copy of the controller-file and be able to ask me questions. No access to FTP and such will be given, so please have this in mind before applying.