Where can graphic design and three-dimensional design work?

I don't know what your major is, but if you want to engage in graphic design and three-dimensional design, I suggest you go to interior design, advertising display design, real estate advertising and so on. Go to an advertising company or a photo studio. Recruiters mainly look at your ability, proficiency and creativity. This is your work experience and work. These are indispensable.

I admire your self-study. Come on, I wish you success.