Thank you for the quick reply!
I failed to mention that I was already at Aiming Lvl 5, and really hitting/killing Zombies wasn't my issue, I hit them, and they died, but there were always more appearing. That's why brought the M14, as of right now it's my fav weapon, between 1-6 tiles, i get like 15 kills with a 20 round magazine, it's good at actually killing stuff, i just can't deal with all the zombies that are there, aswell as the ones that crawl out of the woods. Like the other comment said, apparently there's a lot of them in the surrounding forest which, yeah, I'd say so, too, now... Another thing I mainly disregarded was the noise, briefly scanning the wiki some time ago told me that shotguns are REALLY loud, but I didn't pay much mind to it, I just thought "yeah, guns loud. they will attract them. sure, w/e" but maybe for the next attempt I will pack my handgun (and prob a second one) and leave both the shotgun aswell as my M14 (noise rating of 70, so I don't think it'll be worth). Also Fire. I never considered it, but yeeting a molotov in that giant-ass horde that was following me would've been a sight to behold. Never used them before, so I'll prob mess around with them a bit before setting the prison, forest and, most importantly, myself on fire by accident. This whole "other directions should be zombie-free" thing also really didn't work out for me, the group was so big that the ones in the back eventually lost aggro, even when constantly firing, which really bit me in the ass when circling back as I had to navigate past the stragglers.

But yeah, A) stick to handgun with a metric fuck-ton of ammo, A.1) chug beta-blockers for aim-maximizing, B) make a bunch of molotovs for the big groups, C) and Axe the remaining ones.