Esperanto, welcome to TalkGraphics.
There is no real way to do this for irregular shapes.

Here, however, is an approach using negative space: Negative Space - Text Flow.xar

It requires your shapes to be fixed in place as you create a cut-out of them for a large rectangle that is put on a hidden layer.
I did this with Combine Shapes > Intersect All Shapes.
The cut-out has a Repel Text Under attribute. As it is hidden it is never published but still influences how text on lower layers is constrained.

So create your shapes.
Set up the cut-out.
Add normal linked Text Areas over the shapes.
Add & change your text.
I also set up an overflow off page.

Acorn