If you are looking for the "101" basics, focus on these chapters in the standard user guide:
Not officially. AVEVA provides free User Guides, but the specific "101" training workbook is part of a paid course. You can find legacy versions (v10.1 or earlier) on third-party sites, but they are obsolete. Wonderware Intouch 101 User Manual Pdf
: The development environment where you draw your screens. If you are looking for the "101" basics,