You have to remove the brake drum which is usually not so fun, remove the diff cover then drop out the pin in the carrier, push the axle shafts in towards each other then take a magnet and remove the c-clips, pull the axles out, get the seal out with a seal puller, or I like to use a pry bar just be careful not to scratch the axle tube. I always just use a slide hammer with a hook and work around the bearing until it comes out, you have to make sure it comes out somewhat straight, and don't nick the axle tube. Clean it all up
Then for installation you'll need a bearing installation tool which is just made to sit on the outer race of the bearing so you don't damage it hammering it in, make sure its the right size, the same tool is used for the seal too. Slide the axle shafts back in so you can get the c-clips on then pull the axles out to seat them in position so you can install the pin back into the carrier. Put the diff cover on fill it with gear oil till it runs out the fill hole, put your brake drum on set your brakes and you're good to go.