Machinery, 3D scene, 3D animation and interior design are hard to choose.

I am a mechanical designer and my wife is an art animator. I can give you some advice:

1: mechanical design is definitely the most important thing to learn in these projects, and it is quite experienced. The salary level in this line is ok, but there is a lot of overtime. If you do non-standard mechanical design, you can learn SLOIDWORKS, if you are in the automobile industry, you can learn CATIA, and if you do robot integration like me, you can learn solidworks+Delmia (simulation software); Note that overtime in this business is fierce;

2:3D MAX is the highest salary, which is relatively difficult. A friend works in a cinema. That's what he does. He can earn extra money besides his salary.

3: 3D animation, my wife really couldn't find a job later, so she took the teacher qualification certificate as a teacher.

Interior design is relatively easy, but after all, it's Party B. If Party A asks you to change it, you have to change it.

To sum up, in fact, everything is the same, and you will feel bitter. You should relax. It's a part-time job, and if you suffer, you will suffer. (This is my current state of mind)