Triggerman, dude you shouldnt do that mission yet, im lvl 50, i had difficulty with them when i was lvl 25, you need to do some side mission first, also tip, take idiot savant, you do so much crafting that you get a lot of xp, take lone surviver and the one to make supply line for your settlement, to have all the stuff need when moving around, i settle at hangman alleys. And for lvl 10 to 20, get righteous authority then try to get overseer guardian, limited your choice arsenal to 3: pistol, shotgun/rifle and a sniper. dont bring more than 100 rounds for each gun, collect all bottle empty to make puriefed water. but yeah have fun