"Are they easy to fit? "
Judging by your user-name, I'd have to say "NO"
Cars are easy to repair for a mechanic......mere mortals don't even open the bonnet.........Unplug the machine start removing cabinet access panels......if you find the motor, the capacitor will be connected to it with 2 wires (often it's clipped to the motor-typically a metal or plastic cylinder with the 2 wires poking from one end (or terminals).
If you feel uncomfortably out of your depth,-what about asking a friend/neighbour with good DIY skills? [/quote]
old enough for wisdom, young enough to be compos mentis.