I know that test scenarios, test cases and checklists are different things and are important for testing. I've landed a job as a QA in startup that's adopted scrum methodology and is fast paced. Mostly, the projects are web based with rich & complex features.
So... is it important for me to create super complex test cases (which might be waste of time, because I've been assigned to four projects to handle by myself), or is it better to create simple yet detailed test scenarios and checklist?
Most of my friends that have worked with different companies but similar types of project didn't implement test cases in their testing documentation.
Also, please share any references from books or websites about creating simple test cases for web applications. Thank you so much.