Adobe XD:-Adobe XD is the Adobe prototyping tool for user experience and interaction designers. Adobe XD features are used for creating wireframes, prototypes, and screen designs for digital products such as websites and mobile apps.
If your organisation is partner with Adobe . Then go to their solution partner website(https://solutionpartners.adobe.com/home/hp/learn/training/aem_training.html)there are many free video tutorials which will help you understand basics of AEM. Check out this site also https://redquark.org/aem/day-0...
One solution could be you provide regular expression instead of "/content" which serves your purpose something like restrict the selection up to level Two.(Not sure about this) Another one can be you let author select content path up to any level, but while saving it you reduce path up to level 2. T...
Content Fragment templates should not be avoided ..Make changes in the dialog of CF template and those changes will reflect in your CF Editor.For reference check WE Retail CF templates(/conf/we-retail/settings/dam/cfm/models/we-retail-store-info).
It seems there is an issue with your template.Try creating experience fragment with OOTB(We-Retail Template) once. Error log might be having information about the issue dig through that .
This link will be helpful https://docs.adobe.com/content/help/en/experience-manager-64/developing/extending-aem/customizing-consoles-touch.html You can overlay this node/libs/cq/gui/content/common/startbulkworkflowsand then make the changes according to the requirement. write a script to hide/show ...