Thanks for the messsage. There is a video in our Library on adding fields and also filtering/sorting.
Adding a field you go to Configuration (gear icon) Fields and add a field… it is very flexible.
Our spreadsheets are called Field Lists. You can add the new Field to your field list that is disiplaying.
Sort and Filter are 2 options… you pick a field… drag it to the right as the field to use then select either ASC, DSC or =