Next year I’m planning on taking AP Research (as the second part of the Capstone program), AP Lang, AP ES, AP US Gov, and self-study AP Art History. In addition to those five, I’m taking Stats, Choir, and a fitness course.
Am I gonna regret it?
Doesn’t count. Do it/don’t do it, but nobody will care. As for the rest, it’s doable, but only you know if it’s doable for you.