I think making t-shirt design is a

Quite fun think to make a living:
This one (not mine) triggered that thought:

Source:

https://moteefe.com/pew-pew-pew1?color=white&fbclid=IwAR2GO1vqroS6M1Xy34bsuRpFJvytki6p762jE-BYwVyRl5iyduAlvtkbTMQ&product=men-s-t-shirt