I’m answering this not for what “enhances your application” but for what might help you in college. Have you taken Comp Sci A? My opinion, after teaching AP Comp Sci Principles last year, is that you should take Calc AB/BC next year to get a firm foundation in the many calculus classes you’ll need as a CS major. AP CSP was created to help get under-represented students interested in pursuing computer science. If you are already thinking about majoring in CS, then a lot of the material might be too easy if you’ve had any exposure to basic computer programming and concepts. If you’re not sure, get a code.org account (currently the most popular, but not only, curriculum in use for the course) and take a look at the AP Computer Science Principles coursework and modules and see what you think. If it looks like a good use of your time and might help you make a decision on your major, then sign up for that with Calc A/B. I think the topics covered in AP CSP are something you could progress through pretty rapidly this summer on your own.