loosen the axle nut at the beginning of the project, not after you jack it up and remove the wheel. After the car is jacked up and the wheel removed might just be a bit difficult.
Also... I would recommend both sides on jack-stands with wedges under the rear wheels as a safety precaution.
Also... There is a right and wrong way to drive the pin out.
Also... there is a right way and a wrong way to slip the cv shaft back on... and... to drive the drift pin back in. Care needs to be taken to put the new one on like the old one came off, not 180 degrees out of phase.
Good luck!
Keith