When you start do the machine then sit down do the test then change it.

Put on science, repair and 1 of your choosing. Then look around the house for stimpacks and ammo.

Then go to the chemistry set and make 5 stimpacks and look at the gun and repair it.

Go outside and talk to Sunny and do jobs. The repair does the radio and science does the safe.

Also go to the pawder gangers hide out before you do any quest.