A cloud-based identity and access management service for securing user authentication and resource access
Hello Jorge Perales Diaz,
As discussed offline, the issue resolved by elevating the access for a Global Administrator using the Azure portal.
Initially, sign in to the Azure portal as a Global Administrator and browse to Microsoft Entra ID > Manage > Properties.

Under Access management for Azure resources, set the toggle to Yes.

This adds you as User Access Administrator role in Azure RBAC at root scope (/). With that role, you can now assign Owner role to you under subscription and create resources successfully.
Hope this helps! Feel free to reach out for further queries.
If this answers your query, do click Accept Answer and Yes for was this answer helpful, which may help members with similar questions.