One of the best things you can do to grow as a UX designer is to practice the craft. There are many different methods that UX designers use to practice their skills but one of the best is by creating personas for their company and design services. A persona represents a very specific target market/user. Almost like sketching out a character for a story, you must know their sex, age, background, education, occupation, family upbringing, etc. You even give them a name.
If you can find a person that fits your persona for a project that you are working on, even a mock project, then try and interview them and go through paper wireframes. See where they stumble, ask them why. Nothing beats hands-on, practical experience.