If it's never been apart before, it can be kind of tough to get the carrier out. You should use a "case spreader" to open the differential housing up a tiny bit.. releasing the clamping force on the carrier bearings. However, lots of folks take a couple long screw drivers (or prybars) and pry on the ring gear bolts at the top/bottom of the case... sort of levering the carrier out of the housing. If you do that, it helps to have an extra set of hands. Even a Dana 30 carrier is pretty heavy while laying on your side prying with screwdrivers. Be careful not to drop it on the ground.. or on your fingers. Also, keep track of everything you take out.. those bearing caps must go back on in the original position.
If you're not sure of your mechanical abilities, you may want to solicit the help of someone who's done this before to avoid making costly mistakes.. maybe locate a local Jeep club and ask around for some help?