Can you add columns in Trial version?


I have not committed yet to this platform. I am testing it. I want to try adding closed sales, and some prospects and run reports. I need to add a column in the TRIAL version so I an designate sales as Retailer or Distributor, plus add a column for Country so I can view charts based on geography. It seems when I try to add a column in a sales pipeline report template it is only letting me check a box of predefined columns that exist in that report. Of course the second question is, if I can add columns there in this Trial version, is it easy or difficult to modify charts and graphs with a way to sort and only view Retailer deals closed and won or in the pipeline, and even combine that with other columns such as 'only those in the U.S.' etc. I am really testing the ease of adding such a basic function in Smartsheets.