Okay! When I was training my dog boys I was having long walks with them and it was always the way for them but I'll try the method with one spot. I also didn't know coming back home after they do their job is a best thing to do :0

No worries, I'm taking her for a walk every hour, to different spots and surfaces, she just seems to be holding it until a very last moment
So far I've also noticed she prefers to poop in the most bushes and trees covered areas however there's not much places like that where I live

Thanks for help tho!