help advice shotgun rifle

I'm working on a Charles Daly 3" Field and I have everything put together except for the trigger spring. I've tried several ways and I can not get it to work. Anyone have any idea's or pics of how it sits. Thanks.

I plan on getting a gun for christmas , i'm 15, and i have a Marlin .22 lever-action , Remington Nylon 66, and a Phoenix Arms .22LR pistol. I need some help deciding on a gun to get. I am fairly small so length and weight are a rather large factor. It needs to be under $300 and pretty small and...