You are also taller than most of the Asian guys in my neighborhood - you probably won't ever be tall enough to be the center on a basketball team. But 5'9" is the average height of the average American male between the ages of 20 and 40, so you will likely end up a little beyond that.
The best things you can do to optimize your physical condition are a good diet, exercise and adequate rest. And avoid the negatives - smoking, vaping, drugs, junk food and being a couch potato.
Do you want to share why you are concerned?