To remove the firing pin and spring, you must first remove the safety assembly. Remove the right side lever as you have done before. Push the firing pin in while depressing the firing pin safety plunger on the bottom of the slide on the right; after the firing pin goes forward (quite far), release the safety plunger while holding in the firing pin. You will have to continue to hold in the firing pin while wiggling and pushing on the right side of the safety body - be careful as it comes out - a spring loaded plunger will jump out if it is not restrained. After the body is out of the slide, depress the firing pin safety plunger to release the firing pin; it too will try to jump out. This sounds like a difficult process, but will seem quite simple after you do it the first time. The slide can simply be locked back with the slide stop for this - all the parts are exposed at full slide lock.
To reassemble, place the firing pin (and spring) back into the opening while depressing the firing pin safety plunger; release the plunger while holding in the firing pin - it will be almost flush with the tunnel for the safety body. You will need to push it in a bit further (no need to hold in the firing pin safety plunger at this point) to allow the safety body to clear it. Hold in the safety body plunger until it is buried in the slide. One important consideration - DO NOT mix up the right side lever retaining plunger with the safety body plunger - the springs are NOT interchangeable, despite similar size and appearance.
To remove the extractor, you need a properly fitting punch. Drive the pivot pin out from top to bottom while supporting the slide (it must be removed from the frame) on some sort of wood or nylon blocks. It takes a bit of force to remove the pivot pin. To reassemble, use a slave pin to hold the extractor and start the beveled end of the pivot pin from the bottom of the slide. Drive it in until it is flush with the frame rail channel - check this with a magnifier and by touch. If the pin protrudes, it will either prevent the slide from going back on the frame or eat a groove in the frame.
Hope this helps...