There is a free Google Analytics beginners course available: https://analytics.google.com/analytics/academy/course/6

Course highlights:

• Units 1.4: Focuses on setting up views with filters.
• Unit 2: Focuses on the overall Google Analytics interface, which should help gain a better understanding of the basics of the system.
• Unit 3: Focuses on creating reports.

And some additional reading:

• Adding views: https://support.google.com/analytics/answer/1009714?hl=en
• Adding and managing filters: https://support.google.com/analytics/answer/1034823?hl=en#zippy=%2Cin-this-article
• Reports: https://support.google.com/analytics/answer/1151300?hl=en#zippy=%2Cin-this-article