In previous years, if a proofreader made a mistake, he would be fired. It's much looser now.
Proofreading requires the patience of finding needles in deep water, which tests a person's endurance and pressure resistance. The more uneasy and anxious he is, the worse he will be. This line of work is also very mobile, but it is not depressing, just need to concentrate. If you are very focused, it will be as if you are the only one in the whole world, and then you will get through it and get off work.
The proofreader's salary is ok. For those who don't like to do sales, you can try it.
Finally, give points.