Removing the striker plate is easy, before you do that, push down on the striker block, that's the round piece under the slide, just in front of the mag disconnect. You should then be able to push the striker forward a little.
Here's a pic, it's the larger black round piece, near that "k" stamped in the slide. Just push that down and you can move the striker forward. After that, push in the small pin in the back of the striker plate and push the striker plate off. The striker can then be pulled out from the back. The striker plate pin is spring loaded, but the spring stays put, it won't fly out. When you're ready to reinstall it, just press the spring back in while sliding the striker plate back on. It's actually easier than it sounds.
The only spring that can pop out is for the mag disconnect, but I removed mine because I don't like mag disconnects. You'll notice that mine looks a little different because of that. You may have to push down slightly on the disconnect to get the striker out, then the mag disconnect will come out too, and that part has a spring that I think be able to pop out if you're not careful. That's the only one though. It's your choice if you want to keep the mag disconnect or take the opportunity to remove it for good.