If you constantly have to work with people, then it will be very difficult to do without authority. It directly affects how much people will listen to your opinion. But it is not so easy to raise authority.
You must be a master of your craft. People will listen only to the person whose competence they have no doubts about, and this can only be proven in practice. Higher education alone is not enough, you need practice, and the more of it, the higher your authority will be. Prove to everyone that you are getting your bread for a reason. Write a book, publish an article, achieve something meaningful, then people will start to respect you.
Help others with wisdom. It is not necessary to do all the work for the person, just tell him in which direction to go and how best to cope with the task. You will begin to be respected not only as a good specialist, but also as a good person. This is very important, as the credibility gained only for professional skills can be short-lived. Helping other people will not only improve your communication skills and allow you to understand your own business, but also create additional motivation for further development.
Set public goals and achieve them. This will prove to people that you are a high-level professional. Plus, it will help you achieve something truly meaningful.