Leadership skills can offer greater career development opportunities, as well as helping you to feel more confident at work. Your technical abilities can only ever take you so far; it is important to work on those soft skills as well! Leadership is an important skill to develop which can boost your career.
Begin with taking the initiative. Many bosses assign tasks to their employees, generally things which they have proven to be good at in the past. Instead, why not try going above and beyond your current position? Take on additional projects outside of your job description. The more you do, the more you will learn, in turn, developing your leadership skills.
Think critically when you are working. Try to predict the likely problems before they happen. Good leaders are aware of potential issues and opportunities and can take advantage of these to benefit the company and their colleagues.