The number of AP’s you self study will matter to nobody. For college admissions, they would rather you take the class if it is offered.
Having said that, I did self study AP Psych (and got a 5). While not a strategy I’d recommend, I did it over a weekend with Barron’s (which is sorta why colleges don’t put much stock in simply self studying for an exam).
I have no personal experience with APHG, since none of my prospective colleges would offer credit for it. Good luck.