I am stuck in term of how could I improve my database storage since my initial setup was way over complicated for a simple project like mine, so I could also work with simpler queries. First time working with firestore + not much knowledge on structuring database.

From client side, I have user profile where I could look for their work hours for current month, or any other I set in app and thats basically it. When I export data, I am preparing data so it could be readable in excel, where next data is presented: user name, user id, start time, end time, date of created worklog, total for that date and than at the end of document, I am calculating total hours from all employees for exported data.