What subjects should be learned for gift box design and proofing?

First of all, you need to learn software for graphic design: photoshop, freehand, corelDRAW, illustrator, etc. Among them, photoshop is a picture processing software. There is currently no software that can surpass it. The other ones are necessary for vector graphic design. One of the learned ones. If you are proficient in one, you only need to learn simple operations on the others, such as exporting and importing files, etc. Professional training will teach you what you need to know about printing and packaging, such as paper, size, packaging box molding, and post-processing. You can gradually become proficient in these through contact with the printing factory. You cannot learn it all at once, because you have not come into contact with the real thing and have not done packaging. Visiting color printing manufacturers on site, learning is very abstract...