The bearings should definitely not have gone within two years, they should be good for five at least. Motto - (as seen previously on this site) don't overload the machine.
Funnily(!!) enough I've just had to replace the bearings on my Hotpoint WM63. I replaced them 15 months ago when the machine was just five years old. When I went to get the replacement set this time, the guy in our local shop advised me to check the spindle. Sure enough when I took it apart this time the seal had gone and the spindle was pitted and lightly scored (why this should happen I don't know). Anyway I replaced the spindle and all is running as sweet as a nut at the moment.
Coming back to your original question about how to do it, I seem to remember seeing something about bearing removal on the WMA but I can't find the website!! Not much help am I. If it is any use the procedure on the WM is to disconnect the drive belt, unscrew the nut on the pulley (conventional thread), unscrew the pulley. Remove the front panel of the machine, unclip the drum and swing the whole lot round to the side. You should be able to get away without having to disconnect anything.
Withdraw the stainless steel drum (it might need a gentle(!) tap from the back to free it). Check the spindle for wear or marks where it sits in the seal. Replace if necessary.
As far as the bearings are concerned, I've no doubt it is best to use a puller if you can get one. I managed to drift mine out successfully but it needs a fair old whack to start them off. I removed the rear bearing first drifting through from the front and then the inner bearing going in from the back.
Refitting everything, as they say, is just the reverse of the above. I popped the bearings in the freezer for 10 mins before putting them in just to contract them a bit - don't know if this did anything but they went back OK. Again you need to drift them very firmly to seat them properly.
All in all it took me about three hours but that included going back to the shop to buy a spindle.
I also cut my arms to pieces on the sharp edges of the panels of the machine. Be warned!
If you're using a local shop to get the bearings they should be able to advise you on the correct procedure and offer any advice on the right sort of puller. If I can find the link to the WMA I'll post it. It's probably here somewhere.