You haven’t even started junior year of HS yet, so no, none of us can possibly tell you if Northeastern is right for you- or if you should be thinking about Early Decision.
It’s great that you want to think about your future. Focus on being the best possible version of YOU that you can be, and come back in six months and maybe folks here can be helpful. For now- especially before you’ve taken a single standardized test- we’re all just spitballing.
Why Computer Science? What experiences have you had that suggest it’s a great major for you?