Hey man, I change my oil myself just cuz I like workin on the car but honestly the shops do charge a pretty good rate to change the oil when you add up the cost of the oil+filter yourself.
I don't have the exact specs off the top of my head for the bolts and filter etc but its in the owner's manual, anyways this is how I do it:
-make sure the car isn't too hot before doing this, the oil can burn ya
-jack up the car
-put a sheet or something under the car it since I usually spill a bit by accident
-open the cap on the valve cover so the oil will flow out better
-get a wide mouth container to catch the oil and put it under the oil pan, judging where the oil will land when it flies out
-carefully take off the bolt+washer with a ratchet and hopefully it doesn't fall in the container but you can fish it out afterwards
-let the oil drain for a very long time, if you're in no rush might as well let it all drip out, the oil will first shoot out far and then it will calm down and shoot closer so make sure you adjust where your container is sitting to catch it all
-twist off the old filter, I do it by hand but you might need the filter wrench or stab a screw driver into the side for leverage(carefull, the oil will spill out). try to keep it upright when you take it off so the oil won't spill
-rub some new oil onto the seal of the new filter and put it on, theres specs for this too but I can't recall them right now
-put the bolt back on the pan when its done draining and torque it to specs
-put the car back down so its level
-pour your new oil into the fill hole on the valve cover to specs, we do it in litres out here. add it in to what the specs are, leave it for a few minutes and check the level again to see if its right, adjust the amount as necessary.
-thats all I can think of, good luck.