It's not hard,just be careful when pullling the axle shaft as to not damage the seal. You will also need a ball joint press and adapters to press it in\out. Most auto parts stores will lend or rent this tool.
Pull the wheel and caliper,undo axle shaft nut,remove wheel brg assy bolts from behind knuckle,remove bearing,rotor assy,and axle shaft,then unbolt ball joint and remove knuckle. You can then press out the joints,and reverse process to reinstall. I would recommend Moog for the replacement joint.
Do a search,as there are lots of good tips on the axle shaft nuts,siezed bearings,axle seals etc.