First, "the salary is low and I feel hopeless", and then what are you doing?
Give up what you should. Life does not allow us to look around too much. There is a saying that is very good. "The sooner you give up old cheese, the sooner you have new cheese."
Second, "I feel that I am not suitable for sales. I am too honest to be tactful. " That's just how you feel.
Here, I don't mean to encourage you to run sales. I just want to say that sales is not what you think, honest and dishonest, and it is not necessarily related to whether it can be done well.
Third, "If you want to do something down-to-earth and really have a specialty", then do it.
There is a technology that you can't be hungry at any time. You are still young, and you have plenty of time. If you study hard, you will learn well.
Fourth, "I'm afraid that when I take the postgraduate entrance examination, a lot of graduate students can't do it." You think too much.
As long as you have practical experience and a diploma, the employment problem is not big. In addition, grasping today is the most important thing.
Fifth, taking every step seriously is the best life. . . . . . .