The rear pads are the easiest things in the world to replace ....
Just pull the retainers ('R' Clips) out of the slide pin, then slide out the pin ....
The pads just lift out. Reverse the process to re-install after pushing the pucks back into the caliper.
You can do the whole thing, minus pushing the pucks, without tools.
No need to go anywhere near the axle.

CAKE
And if you are in the habit of using rear brakes at all .... 8,000 miles is about all you can expect.