Workflow to repeat on first Monday every month

I have an app to automate tasks based on a triggering date.

This date is the first Monday of the month.

I would like this date to be changed by a workflow to the Monday of next month and so on after the triggering date has past (or the item was updated).

Any idea how I can achieve this?

I was thinking about a loop that goes up from the 1. to the 7. of the next month and checks for each that if it is a monday and and returns the first date where this condition is true, but I don't know how to do it. 😃