A plug boot puller comes in real handy , especially on the driver's side rear plugs.
Start on the passenger side front remove the boot and plug , set the gap on the new plug and install it BY HAND as far as it will go , at least 3-4 turns so you don't crossthread it. Then tighten it with the socket .Be sure to use a spark plug socket with the rubber insert . Remove the old pug wire from the coil pack for that plug only and install the new one.Do not remove all plug wires at once , just one at a time for the plug you are changing.
There should be a sticker on the header panel near the hood latch . Look at it carefully and you should find what the plug gap should be .
Do not throw away the old plugs until you are done and the engine is running OK. If you break a new plug while installing it , which can happen easily , you can always throw in an old one to get you back to the parts store.
The two plugs on the driver's side closest to the firewall are the hardest to get to . Save doing them for last .