G-Suite is the term used now for Google Apps for Education
If you are new to G-Suite, check out these sites.
https://edutrainingcenter.withgoogle.com/resources/tools Right from Google, pick the icon for the training you need!
Google Classroom Top Resources
http://alicekeeler.com/ She is my first go-to-guru with questions I have. She also provides a multitude of templates that you can copy and adapt to your needs. There is no need to reinvent the wheel!
BEFORE YOU SET UP CLASSES look at these tips from the experts!
http://www.shakeuplearning.com/blog/6-tips-getting-started-google-classroom-infographic/
http://alicekeeler.com/2015/05/16/10-things-to-start-with-in-google-classroom/
http://alicekeeler.com/2015/10/27/google-classroom-students-getting-started/ This is something you can show your students to get them started in Google Classroom.
http://50thingsbook.com/ A site built by authors Alice Keeler and Libbi Miller who also wrote two books. The first was entitled 50 Things You Can Do with Google Classroom and almost immediately came out with their next book entitled 50 Things to Go Further with Google Classroom. The site provides a detailed walk through in setting up Classroom.
If you have questions, type your question keywords in the URL address box. Choose the best result for your needs.
Go to YouTube.com and get video tutorials. Several I follow are Alice Keeler, Jeffrey Bradbury, Sam Patterson among others.