This is a very difficult question to answer.
Astronomy requires a mastery and proficiency in the physical sciences, mathematics and statistics.
I suspect that by the time you enter your first year in college, you have already made the choices that will allow you to consider one or the other of these seriously. Sadly, by the time many students get to college, they have been distracted by either poor counseling, peer pressure, a turbulent home life, or poor roll models, to develop the kind of personality that will serve them well in the physical sciences. Both professions are very harsh, demanding and have a long educational learning curve. You must decide within yourself how you FEEL about endless secluded hours of studying how dust grains are heated by starlight in interstellar space versus equally endless hours in the chemistry lab wondering about some equally obscure organic reaction that might be the key to a new vaccine. It is a wonderful, exciting world out there.