Your brag document is something you should input into at least once a week. You should use entries in your 1-1’s with your manager, in performance reviews, promotion reviews, pay reviews, job interviews, salary negotiations, updating your LinkedIn profile, updating your CV, and many more reasons.
Click the arrow next to “New”, you can click the three dots next to a template to edit or click “new template” to add a new one. Each time you make a new entry in the table you will be able to pick an entry template with some pre populated fields. Have a play around with these and see what works for you best.

I have added different types of views like Q1-4, categories etc.

You can delete any of those you don’t want to use by right clicking the view and deleting.
Or you can create your own. If you click the “2 more” button it will give you an option to add a view. All of the views here are table views but you can add a list view, calendar view etc. Once you have created a new view you can add whatever kind of sorting or filters you like.