SharePoint Online Site Configuration Specialist

I'm currently utilizing SharePoint Online and need assistance with site configuration. Due to the technical nature of this project, I am seeking someone with extensive experience and expertise with this version of SharePoint. Although I skipped the question on specifics, it's a possibility that tasks could include setting up access permissions, creating new sites or sub-sites, and configuring document libraries. The ideal candidate would have a comprehensive understanding of these configurations, demonstrating an ability to work independently and troubleshoot any potential issues.