How to organise my csv data converted from fit?

Hello everyone,This data is an activity csv file converted from fit format by using java fittocsv tool. I need to put data in order for my project. I ve had a look at all the files in garmin fit sdk. I am beginner in this stuff. Is there any helper code or anything inside it? Please help me. How can make it more understandable, readable? I ve put an image taken from my converted data. I wanna change it in a short way but how?