To answer your question first, introverts can do sales, but they need to find a sales type that suits them, so that they won’t have a hard time doing it. There are many introverts around me who do well. Sales are divided into many types. From the perspective of the type of sales leads, there are active and passive. Judging from your actual situation, I think you may be suitable for passive or service-type or consultative sales. The sales leads of this type of sales are usually passive, and you need to give customers your professional advice on technical selection, etc. to complete the sale. I think this type of model sale might be suitable for you.
Extroversion is not a necessary trait for sales. I think the sales traits that are more important than extroversion are: initiative, enthusiasm, hard work, academic ability, service, etc. However, introverts have some natural disadvantages when doing sales compared to extroverts. First of all, in terms of interpersonal communication, introverts are usually more passive and will not take the initiative to interact with others. Not good at getting close to people quickly. In this case, there may be fewer opportunities than them. But we can find ways to compensate for these shortcomings. We can make up for it with other qualities. For example, if we put in more effort and provide faster and more considerate services, we will also get closer to our customers and gain their trust.
Human personality is difficult to change, but I think our behavior can be changed. Although we are introverted, we can "pretend" to be extroverted and "pretend" to be sophisticated. As long as we pretend for a long time, it will naturally become true. In fact, this is what I did. So far, "pretending" has been successful. But before "pretending", you need to do some homework, such as necessary basic communication skills and knowledge of etiquette. After some training, I think we can "pretend" to be successful. However, I personally don’t recommend doing this as it will make you very tired.