I am a veteran. What should I do if I find that I don't know anything after I leave the army? I graduated from high school and served in Xiamen Armed Police Special Service for two years.

What do you mainly want to know? Like the actual computer level? English level? . . . . . . Or repair the computer? Or teach English? . . . . . . If it's the first thing you want to learn, buy some books and take the exam yourself, then you will. If the latter continues to buy some books for their own research, then you can, hehe, draw inferences from one another, see? Laugh before you do difficult things, because those difficulties are about to be overcome.