As to how to change it, there are video's on the Internet that will take you through the oil and filter change step by step. I recommend that you view one until you are comfortable in doing it yourself. Congratulations on wanting to do it yourself! You will find that it is very easy to do.
If I recommend any oil or type then we will be STARING A OIL WAR, so I will phrase it this way, look in your manual and follow whatever the factory recommends. If you don't have a manual, then with only 5000 miles on your Wrangler, then I am going to guess that you have a 2012, or 2013. Per Chrysler recommendations 2012, 5W30 conventional oil meeting their MS6395 requirement and it must be API GL-5. The same applies for 2013 with one change use 5W20 weight oil instead of 5W30 used in the 2012.
As for the change intervals, well that may start another war, but I would say change it at 5000 mile increments and you should be safe.
Get in the habit of checking your oil level weekly.