Selenium Test for Website

I have a website with an application written in Angular 6/PHP7.1. I need automated tests written which will open the website and test a number of different features to ensure they are outputting the correct output. The tests should: 1) Go through a product select process to test each option 2) Open up our custom editor 3) Add text, graphics and other artwork to a canvas using our UI 4) Verify that the output from the editor is correct 5) Test output from APIs to ensure they are correct. We will need basic documentation on how to update the tests for future changes to the app