Transmissions aren't that hard. Swing axles and seals aren't that hard either.
You need special tools to rebuild. You need a hydraulic press, and lots of sockets/spacers to push with. You need a long pair of heavy duty needle-nose pliers with a little grinding to remove/install the axle circlips in the differential.
You need good instructions as well. You need to do research, and take your time.
Remember, I was told(on here and Facebook) that I'd never get my trans back together and have it work. Whatever. I've had it apart several times after I beat the snot out of it. I've broken synchros, circlips, and a third gear synchro hub.