I know someone who was 18 when he graduated from Wake Forest University. He is from Saudi Arabia. Now he is 19 and attending Stanford for graduates school for Computer Science. I don’t think age will hurt you. You are obviously mature, which is the important part.
All I have to say is this: Say you waited a year or two (whenever it is normal to start college from your school), imagine how much more you would be able to accomplish in high school. You are 15, and already did all of this with a 34 on the ACT. Like my god.
But seriously, don’t worry about your age.