The difference between your main income and extra income
The reality is that you can get extra money from part-time jobs. Mostly you do it from 30 minutes to 4 hours depending on the job type, so you don’t need to do a full-time job like 8 to 16 hours per day to make extra money.
If you do a full-time job, that is your main job and it will let you make standard money which is your main income. To make extra money, you just need to spend some of your free time. So there is a difference between extra money and standard money.