What is obvious is that it takes effort to learn how to overcome social anxiety as it is not something a person can control all the time. Probably, the best thing to begin with is to try using a self-help manual. There is no guarantee that it will help you right away but it will at least boost your confidence.
Another useful tip is to try working with a therapist. The reason why it works in so many cases is that you constantly have someone you can talk to. What is more, a therapist is that kind of person who is always ready to assist you. You can fully rely on them.
Create goals and do your best to achieve them. Stick to a routine and try to take one step at a time. Overcoming social anxiety is not something you can do in a week. It will definitely take a lot of time. Yet, you will be really proud of yourself when you achieve success. It is that kind of thing which is possible to do.