An oil change is not a hard thing to do. First, you will need to drain the old oil. On the bottom of the engine, you will find a drain plug on the oil pan. Place a container under the drain plug that will hold at least 6 qts of oil. Remove the plug and allow the oil to drain. When it all drains, clean the drain plug, check for any damage to the gasket, and if it's ok, replace it and tighten.
Next locate the oil filter. It should be on the right side of the motor. Remove the filter and make sure the o-ring gasket is still on the filter. If it isn't, remove it from the engine block. Take the oil filter, place a thin coating of oil on the new filter's o-ring gasket, and replace it on the engine. The filter should be as tight as you can make it by hand, then a 1/4 turn with an oil filter wrench.
Now, it's time to reinstall the oil. On the top of the engine, find the oil fill location. It most likely will be on the valve cover. Remove the cap, and install the new oil. Keep in mind the oil being used must be an acceptable weight. The oil weight requirements can be found in the owner's manual. I would suggest a 5W30 or if there is a weight listed on the oil cap, use that.
When filling the oil, your vehicle should take between 4 and 5 quarts of oil. Start at 4 replace the cap and start the engine for about 30 seconds. Turn the engine off and check the oil level with the dip stick. Add small amounts, if needed, until the oil is to the full mark.
I hope this helps. Let me know if you have any other questions.