Hi,
I'm website developer and website administrator with over 4 years experience working with different content management systems. I can say that I have worked on and I have mastered the following CMS's:
Drupal 7, Drupal 8, AEM,Adobe Communique (CQ5 - the old version of AEM), FirstSpirit (e-Spirit), WiX, OpenCMS, Shopware, SDL Tridion, typo3, Squarespace.
I believe that you won't find more skilled and prepared to give you information about different content management systems freelancer than me. I also have a personal website https://zhekov-dev.com. You can check the website and also check my profile here at freelancer or at linkedin.
Best regards,
Nikolay Zhekov