I'm going to need pictures of your vagina to confirm there are no blockages.
Squat and piss is the most common I've seen, but you could also just lean back against a tree and spread but that's pretty showy if there's people in the area. I don't know how you're hitting your heels while squatting, your feet shouldn't be that close together and your pee stream shouldn't be going straight down unless you're hunching over.
I love these zoomer "I don't know how to wipe my ass" threads, it makes me feel so much better about myself not knowing how to do things like processing animals after a hunt when there's people that literally can't even piss.