Everyone has their own dreams as a kid. Let find out if that dream is still big enough and passionate enough for you to follow.
You should consider your study ability. You might feel anxious about some subjects that you are not good at school, but consideration should not be an obstacle that stop you from doing what you want to do.
Information can easily be found on Education centre, Schools, University website. Gaining more information will help you to decide and compare the major that suit you the best. You can take advice from your family and friends, but you will always be the one who decide your future. Let's make a decision that you won't regret in the end.
Decide what you want to do for the rest of your life is not easy. Some peoples spend their entire life without knowing what they want to do just because "life keeps carrying on". Have sometime for yourself to think, travel, read books, meet new peoples, try different works to find out what you like and dislike.