you can make additional tool in workbench (Tool) its cost 1 metal part and 1 junk and for crafting 7.62 ammo you need to go to sierra army depot where is ammo terminal but its not safe there soo i dont recomend it
If you want to make enemies, try to change something.
Also try going at a time when the least amount of people are online, to improve your chances of not meeting anyone unfriendly.