No need to bring your own computer.
Computer equipment is provided at the training site, and it is not necessary to bring it. But the class time is limited, and a lot of exercises need to be done at home. If you don't have a computer at home, I suggest buying one. Desktop is better, faster and more efficient than notebook.
A variety of career choices
Many enterprises need graphic designers, not just advertising companies. Even in the field of LED lamp business, graphic design skills are needed. Try to join this industry and you will find infinite possibilities. A skill does not limit your career choice, nor does learning graphic design.
Demand is high, but wages are generally not high.
The graphic design industry has a large number of people and great demand, but the wages are generally not high. Many training courses are just for profit, and short-term training can't be compared with years of experience. Don't be too optimistic, be down-to-earth, persevere and you will succeed in the end.