Piece of cake to remove the SIM. You really should get the user's manual from Apple's site.
I used a pushpin. The SIM tray is on the top of the phone. Push the pin in firmly, the tray will move out a little. I then used the push pin to hook the hole and then pull the tray out.
I tried a couple different SIMs and grabbed some pictures of the results, didn't get anywhere, yet...as expected.