EndNote Basic helps you to organize your research material, including journal articles, into your own online mini database. It is FREE .
EndNote Basic Features covered in the EndNote Basic Workshop, Nov. 3, 2020
There is no EndNote Cite While You Write tool available for Google Docs
However it is still possible to use EndNote with Google Docs by inserting unformatted citations, saving it as an RTF file and then formatting the document using EndNote.
Need help editing your EndNote Basic records? See
University of Hawaii's Editing EndNote Basic