About 20 years ago, I had a District Manager tell me "that the difference between a job and a career is with a job you expect to get paid next Friday for the job you did today, with a career you expect to get paid a year from next Friday.
The same goes for becoming a professional. It's when you stop working for the pay at the end of the night, and start doing a better job so you can get future jobs, bigger jobs, and better pay. That goes either if you work for yourself or for someone else, full or part-time.
Doug J.