I worked as their appraiser the other day, I think it is not difficult, but I will be a little nervous for the first time. They can train, so they may start to digest and become skilled. In fact, it is similar to your usual shopping, and each task has different requirements.
If you don't understand anything, I suggest you ask their customer service or project leader. Good attitude. This part-time job is quite interesting. You can earn some pocket money. You can try.