For the sake of brevity, we'll assume you know what you're doing somewhat, and I'll skip over obvious things like "make sure the guns unloaded" and "remove the barrel from the action", as well as showing you how to remove the butt plate and stock.
Once you have your stock off, with the action laid out in front of you, you can see the inner workings of your gun.
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Remove the trigger guard.
The next step is to drive out the trigger pin. One side is peened and larger than the other, so be sure you go in the correct direction. It should be fairly easy to tell which side is peened and which is not. While you are doing this, take note of how the trigger return spring is positioned inside the trigger.