Hello!
That has potential to be a good example! To make it stand out, make sure you clearly explain
how and why this was an ambitious goal. For instance, improving commercial awareness takes sustained effort over time, especially where you are taking the initiative to organise discussions and lead sessions outside your studies.
You could explain that your goal was to develop a deeper, more practical understanding of commercial issues (something that many students find difficult to maintain consistently), and then explain how you pushed yourself (i.e. setting up the Whatsapp group).
Make sure you also show the outcome - how your confident or analytical ability improved, or how it helped you perform better in interviews or applications. That way, you are demonstrating ambition and drive, and linking these to tangible results.
I hope that helps!