First of all, you'd better have enough ability. After all, the student union is a place to do things, and your ability can decide everything. If you are not competent enough, no matter how excellent you are, you will not be entrusted with a heavy responsibility. If your ability is not strong enough now, you need to exercise yourself and gradually increase your strength.
Secondly, we should be more responsible than others. Whenever there is any activity, you'd better take an active part and dare to stop something. Everyone likes those who share the affairs and relieve the pressure for themselves. A positive attitude will make others think that you are a sunny teenager. Although there may be more troubles for you in the future, it doesn't mean that they are reusing you.
Not to mention interpersonal relationships. In college, your interpersonal relationship is the best expression of your ability. How many people you know determines the difficulty of your future work. For example, if a college wants to hold activities jointly with other colleges, it needs to discuss with the other people. At this time, if you stand up and say that you happen to know each other well, they will of course let you discuss with each other, so as long as you get things done, you will be even more impressive.
The student union is a good place to exercise yourself. From the first interview, selection and competition with others, you will have great growth, and your promotion to a good position in the student union will be beneficial to your life in college. I hope you can join the student union.