Working in a field of your degree qualification right after you graduate is the most likely possible scenario in your head at some point in your life, but nothing could be further from the truth. As a matter of fact, according to a study by CareerBuilder (an online employment website), nearly half of college-educated workers declared that their first job was outside their field of study. Whether it is an ambition shift or an out-of-options decision, working outside your scope of practice, especially for your first job, is perfectly natural and you can still get employed in a field you did not major in.
Some people tend to think disapprovingly of working in such areas, thinking that it is a waste of time and effort to be studying a certain major for a few years just to end up working in a different field, neglecting the abundant positive experience that the student gains during these studying years. The effort and time that you put in studying for any degree is in no way a waste. Those years were merely your very first building blocks. They are also your tools that you will use throughout your life and occupation irrespective of the field you choose. No matter what kind of job you get into, it is almost certain that you will use most of the skills that you gained during studying at your university. These skills vary widely and can be basic problem-solving, communication, studying and learning skills. When you get in your first job, the employer expects you to apply these kinds of skills in your job, and that is why building these skills was your very first step to get into a job even if it is outside your degree qualification.
Do not worry about giving it time and thinking about what it is that you want to do in life. If you already know for sure what it is that you want to do, then you are already one step ahead. Now all you must do, is to not let your degree be a prison for your own life goals.