Powershell to list all documents in sharpoint online ( multi sites )

I have a sharepoint tenancy with multiple sites in it. I need to list all documents in one export/csv/excel. Attached is a similar script I have domne to list all users and requires "sharepont management shell". I need another one for the documents. but it requires more skill than I have.. I will also need support getting it to work on my machine, if I nbeed anything other than ./scriptname to execute it. ( as I have said I have already got the "sharepont management shell" installed, and the attched script executes correctly - so I am hoping its not likley to need anything else ?? ) I have posted my attempts to get this working here [login to view URL] but frankly dont understand the advice.. so looking for help to write the thing for me!! would need appropriate comments.. I will try and describe the enviroment and what I hope to get in the export. we have an intranet running on sharepoint made up of multiple sites. each site is named in the style intranet<some other string> i.e intranet_hr_support , intranet_comms_design so would only like to "export" from sites with "intranet" at the beginning. all the documents are within folders in multiple libraries in the multiple sites so would be looking to get an export that has a filed/csv/cell etc for site, library, folder structure, document name. and maybe the below. these would be useful, but if hugely complex can do without.. author, last modified, < in-fact any other attribute you can export easily >