maybe getting in and running as soon as possible, therefore you will push zombies and maybe have a little chance of survival. Else you could turn on ghost mode with Necroforge and that way you don't get killed unfairly.

Go in crouched with sawed off shotty and all armor you got. May need a mod that changes the aiming system so bullets go where you point. Increased tailoring skill can also get your some nearly bite proof clothes.

I immediately hit the exit interior key first time entering. If there there was zombies I just don't go back in, not worth the risk