its a simple enough job, just some work involved.
car up in the air on stands
wheel off
undo the outer and inner end bolts for the control arm to remove it (can be siezed on pretty tight so maybe get some wd40 on them then come back later)
press out the old bushes (hard to do it without a big press, I broke a little mobile press doing UCA bushes)
grease then press in the new bushes
reinstall the upper arm, tighten bolts to spec (pretty damn tight, check the workshop manual)
wheel back on
car back on ground
tighten wheelnuts to 110nm
drive to wheel alignment
assuming the bushes are not adjustable you will have not problems driving to a wheel alignment. if they are adjustable be careful, random wheel alignment can lead to very unpredictable handling (camber affects toe as well). try and set adjustable bushes at home first to same time and money at the wheel aligner..shorter distance between inner and outer bolts = more camber.