What kind of work you can get with a private pilot licence?
You cannot do so.  A private pilot’s license - at least in the US - prohibits you from offering airman services for compensation or hire.  

If you intend to fly professionally, you will need at least a commercial pilot’s certificate.  An instrument rating is also highly recommended as is multi engine class ratings for the greatest chances of employment.  Air carrier operation will require you to hold an airline transport pilot’s license for part 121 operations.