Since you want to stay in NJ, start by looking at Peddie, Blair, Hun, Lawrenceville, and George (in PA, but only about 20 minutes from L,ville and Hun - just acrossthe river.) If you need FA to make it work, George and Peddie are probably your best bets. You aren’t too late to make this happen, btw, and many schools are test-optional this year. But you will need to get to work quickly.
You are lucky in the sense that many schools now have many online resources available, so if you devote a little time to this, you can figure out what you need to do.
George, btw, has a lot of students who have been active on climate issues, so your interest could not only be well met, but you could also be seen as a good fit (which is helpful on the FA front.)