For your self-training needs on Google Apps such as Gmail, Google Sheet, Google Docs. Hangouts, Google Drive, Google Slides, Google Forms, Google Calendar...and more, please check this link: https://apps.google.com/learning-center/
Google Apps Training Center - Get help using your email, calendar, documents, and other Google Apps
- Docs: How to create, edit, and share documents, spreadsheets, and presentations.
- Drive: Access, organize, and share all your files from any device, anywhere.
- Gmail: A guide to Google's powerful email environment.
- Calendar: A guide to getting yourself established with Google's calendaring application.
- Sites: Discover how to quickly create web sites without knowing HTML.
- Groups: How to manage and participate in Google Groups.
- Chat: Send instant messages to other Gmail users with the Google Chat gadget.
- Contacts: Using Google Contacts at work or school
- YouTube: YouTube Help Center
- Chrome Sync: Learn how to sign into Chrome and enable Sync