Problem with CSV upload in Clay: Need help separating columns for correct data input - Gail

Hi , I am new to Clay. I am testing the free version for our company. So what I am having a problem with is that I uploaded a CSV file which has a few different columns, but everything is in one column after I uploaded it to Clay. It doesn't give me the option for more columns or fields to put the correct data in. Or maybe I am doing something wrong. Can you assist me please. Thank you Gail