Do more and experience more. Experience more relationships. Experience more types of work. Experience more books. Experience more traveling. Immerse yourself into all the skills that you really desire to gain more wisdom.
As you get to know yourself more, make more decisions (both bad and good ones), you’ll build your wisdom through time. It’s a process that is never finished. If you are focused on becoming a wise person, you’ll focus on building more experiences for yourself that allow you to make good choices based on your values and morals.